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Publication #HS737

Chapter 17. Sweet Corn Production1

Ramdas Kanissery, Eugene J. McAvoy, Richard N. Raid, Johan Desaeger, and Julien Beuzelin2

This is Chapter 17 of the Vegetable Production Handbook of Florida, 2020–2021 edition. The tables and most current version of this chapter may be found at http://edis.ifas.ufl.edu/pdffiles/cv/cv13500.pdf.

Botany and Planting

Sweet corn—Zea mays var. rugosa, Poaceae (Gramineae).

Table 1. 

Planting information for sweet corn.

Planting dates

North Florida

Feb–Apr

Central Florida

Jan–Apr

South Florida

Oct–Mar

Planting information

Distance between rows (in)

28–36

Distance between plants (in)

6–81

Seeding depth (in)

1.0–1.5

Seed per acre (lb)

6–15

Days to maturity from seed

64–90

Plant population (acre)

24,000–32,000

Cultivars

Tables

Table 2. 

Description of major sweet corn cultivars currently available.

Type

Genes controlling sweetness

Storage life (days)

Relative sugar content

Sugary

Full complement of sugary

1 to 3

Normal

Sugary Enhanced, also “Modified” and “EH”

Full complement of sugary (su) and

half or full complement of sugary enhancer (se)

3 to 5

Slight to moderate or even high levels

Supersweet, also “Ultra,” “Extra” sweet

No sugary (su); full complement of shrunken-2 (sh2)

5 to 10

High

Synergistic, also “Sweet-Gene Hybrid”

Full complement of sugary (su) and half complement of shrunken-2 (sh2)

3 to 5

Moderate

Improved Supersweet

Half complement of sugary (su) and full complement of shrunken-2 (sh2)

5 to 10

Very high

ADX

No sugary (su) or shrunken-2 (sh2) genes; full complement of ae, du, and wx genes.

5 to 10

Moderate to high

Table 3. 

Yellow

White

Bicolor

Accentuate

Crookham 433

Battalion

Beyond Multisweet

Devotion

Beyond BC

Brezza

Glacial

Big Time

Crookham 382

Munition

BSS 1075

GSS 1170

3380 XT

Crookham 423

Hercules

 

Honor XR

Passion

 

Obsession

Primetime

 

Prestige

SV 1446

 

Seminole Sweet

1336

 

Summer Sweet 2182

   

Summer Sweet 8102 R Plus

   

2182

   

7143

Table 4. 

Herbicides approved for managing weeds in sweetcorn.

Active Ingredient

lb a.i./Acre

Trade Name Product/Acre

MOA Code

Weeds Controlled/Remarks

Labels change frequently. Be sure to read a current product label before applying any chemical.

*** PREEMERGENCE ***

Atrazine

Mineral Soil 1.0–2.0

Muck Soil 2.0–3.0

(AAtrex) 4 L

Mineral 2–4 pt

Muck 4–6 pt

(AAtrex Nine-0) 90 WDG

Mineral 1.1–2.2 lb

Muck 2.2–3.3 lb

5

Germinating broadleaf and grass weeds. Apply to moist soil. Do not exceed 2.5 lb a.i./A per calendar year. Consult labels for plant-back restrictions on rotational crops.

Carfentrazone

up to 0.031

(Aim) 1.9 EW

up to 2 fl oz

(Aim) 2 EC

up to 2 fl oz

14

Apply as a preplant burn down for emerged broadleaf weeds. Use crop oil concentrate, methylated seed oil, or nonionic surfactant at recommended rates. Maximum rate of 0.096 lb a.i./A per season. No pretransplant interval.

Dimethenamid-P

0.56–0.84

(Outlook, Slider) 6 EC

12–18 fl oz

15

Annual broadleaf and grass weeds. After application, incorporate into soil by rainfall, sprinkler irrigation, or mechanical tillage. Consult label for rate based on soil texture.

EPTC 4.0–6.0

(Eradicane) 6.7 E

4.75–7.33 pt

8

Annual broadleaf, grass weeds, and nutsedge. Use lower rates on lighter soils (sand). Control of perennial weeds such as bermudagrass or nutsedge is increased through incorporation.

Flufenacet

0.49–0.68

(Define DF) 60 DF

13–18 oz

(Define SC) 4 SC

15–19 fl oz

15

Annual broadleaf and grass weeds. Rainfall, irrigation, or light cultivation is required within 7 to 10 days of application. Consult label for rate based on soil texture.

Glyphosate

(various formulations)

consult labels

9

Emerged broadleaf and grass weeds. Apply as a preplant burndown. Tank-mix with a residual herbicide to broaden spectrum of weed control. Consult label for individual product directions.

Mesotrione

0.188–0.24

(Callisto) 4 SC

6.0–7.7 fl oz

28

Annual broadleaf weeds. Tank-mix with a preemergence grass herbicide for grass control. Do not exceed 7.7 fl oz/A per season.

Paraquat

0.5–1.0

(Gramoxone) 2 SL

2.0–4.0 pt

(Firestorm) 3 SL

1.3–2.7 pt

22

Emerged broadleaf and grass weeds. Apply as a preplant burndown. No more than 3 applications per year. Tank-mix with a residual preemergence herbicide to broaden the spectrum of weed control. Consult label for new restrictions.

Pelargonic acid

(Scythe) 4.2 EC

3%–10% v/v

27

Emerged broadleaf and grass weeds. Apply as a preplant burndown treatment. Product is a contact, nonselective, foliar-applied herbicide with no residual control. May be tank-mixed with soil residual compounds.

Pendimethalin

Mineral Soil 0.75–1.0

Muck Soil 1.0–2.0

(Acumen, Prowl) 3.3 EC

Mineral 1.8–2.4 pt

Muck 2.4–4.8 pt

(Prowl H20) 3.8

Mineral 2.0–3.0 pt

Muck 2.0–4.0 pt

3

Broadleaf and grass weeds. Overhead irrigation or rainfall is required within 7 days of application.

Pyraflufen

0.001–0.003

(ET Herbicide) 0.208 EC

0.5–2.0 fl oz

14

Emerged broadleaf weeds. Apply as a preplant burndown treatment.

S-metolachlor

1.0–1.6

(Brawl, Dual Magnum) 7.62 EC

1.0–1.67 pt

(Cinch, Dual II Magnum) 7.64 EC

1.0–1.67 pt

15

Annual broadleaf and grass weeds. Use a lower rate on lighter soils. Weed control is increased with 0.5 to 1 in. of rainfall or irrigation. Do not exceed 3.9 pt/A per crop year depending on soil texture.

Simazine

2.0

(Princep, Simazine) 4 L

2.0 qt

(Princep, Simazine 90 WDG

2.2 lb

5

Broadleaf and grass weeds. If a second application is required do not exceed 2.5 lb a.i./A per calendar year. Simazine 4 L and Simazine 90 DF can be applied to muck soils at 2.5 lb a.i./A. PHI 45 days.

*** POSTEMERGENCE ***

Atrazine

Mineral Soil 1.0–2.0

Muck Soil 2.0–3.0

(AAtrex) 4 L

Mineral 2–4 pt

Muck 4–6 pt

(AAtrex Nine-0) 90 WDG

Mineral 1.1–2.2 lb

Muck 2.2–3.3 lb

5

Broadleaf and some grass weeds. Apply before weeds exceed 1.5 in. tall and before corn exceeds 12 inches in height. Do not exceed 2.5 lb a.i./A per calendar year. Consult label for plant-back restrictions on rotational crops.

Bentazon

0.75–1.0

(Basagran) 4 L

1.5–2.0 pt

6

Certain broadleaf and sedge weeds. Consult label for weeds controlled/weed size table. Do not apply more than 4 pt/A per season.

Carfentrazone

0.008–0.016

(Aim) 1.9 EW

0.5–1.0 fl oz

(Aim) 2 EC

0.5–1.0 fl oz

14

Emerged broadleaf weeds. Apply up to the 14-leaf stage of corn growth. After the V8 stage of growth, apply as a directed application. Do not apply more than 2.0 fl oz/A per season including preplant burndown and crop application. PHI 3 days.

Halosulfuron

0.03–0.05

(Sandea) 75 DF

0.6–1.0 oz

2

Broadleaf and nutsedge weeds. Apply over the top or with drop nozzles from the spike to the layby stage of corn. A sequential application of 0.66 oz/A may be with drop nozzles to avoid application to the plant whorl. No more than 2 applications per year.

Mesotrione

0.094

(Callisto) 4 SC

3 fl oz

28

Broadleaf weeds. Treat up to 30 in. tall or up to the 8-leaf stage. Include a crop oil concentrate or nonionic surfactant in the spray solution. Slight leaf bleaching may occur. Do not exceed 7.7 fl oz/A per season.

Nicosulfuron

0.03–0.06

(Accent) 75 WDG

0.6–1.3 oz

(Accent Q) 54.5 WDG

0.9–1.8 oz

2

Broadleaf and grass weeds. Sensitivity to sweet corn varieties is variable. Do not apply to ‘Merit’ sweet corn. Do not apply to corn that has previously been treated with ‘Counter’, ‘Lorsban’, or ‘Thimet’ insecticides because this may result in injury. Consult label for acceptable insecticides. Apply broadcast to corn plants less than 12 in. tall. Apply with drop nozzles to direct spray to corn plants 12–18 in. tall.

Pendimethalin

Mineral Soil 0.7–1.0

Muck Soil 1.0–2.0

(Acumen, Prowl) 3.3 EC

Mineral 1.8–2.4 pt

Muck 2.4–4.8 pt

(Prowl H20) 3.8

Mineral 2.0–3.0 pt

Muck 2.0–4.0 pt

3

Broadleaf and grass weeds. Apply after 4 in. tall until corn is 20 to 24 in. tall or the V8 growth stage. Direct the spray to the base of the plants.

S-metolachlor

up to 1.9

(Brawl, Dual Magnum) 7.62 EC

up to 2.0 pt

(Cinch, Dual II Magnum) 7.64 EC

up to 2.0 pt

15

Annual broadleaf and grass weeds. Apply after crop emergence up to 40 inches in height. Direct spray to the base of the plants when plants are taller than 5 in. Use a lower rate on lighter soils. Weed control is increased with 0.5 to 1 in. of rainfall or irrigation. Do not exceed 3.9 pt/A per crop year depending on soil texture. PHI 30 days

Tembotrione

0.08

(Laudis) 3.5 EC

3 fl oz

28

Annual broadleaf and grass weeds. Crop tolerance is dependent on variety so apply to a small area if tolerance is unknown. Do not use on ‘Merit’ or ‘Shogun’. May be applied from corn emergence through the V7 stage of growth. Do not exceed 3 fl oz/A per season.

Topramezone

0.020–0.022

(Armezone, Impact 2.8

0.75–1.0 fl oz

28

Broadleaf and grass weeds. Consult label for maximum size of certain weed species for control. PHI 45 days.

Table 5. 

Insect or Mite Pest

MOA Code1

Trade Name

(Active Ingredient)

*Restricted

Rate

(Product/

Acre)

REI

(Hours)

Days to Harvest

Remarks2

Labels change frequently. Be sure to read a current product label before applying any chemical.

Please refer to Chapter 19 for information on biopesticides, including materials labeled for certified organic production.

Aphids

1A

*Lannate LV

*Lannate SP (methomyl)

LV: 0.75–1.5 pt

SP: 0.25–0.50 lb

48

0—ears

3—forage

21—stover

Certain hybrid varieties are susceptible to methomyl injury. Treat a small area to determine safety first.

 

1B

Fyfanon

Fyfanon 57% EC

(malathion)

1.5 pt

12

5

Maximum of 2 applications per year. Crop injury may occur in the whorl to silking stages.

 

1B

Lorsban 75WG

*Advanced

15G

(chlorpyrifos)

75WG: 0.33–1.33 lb

Advanced: 1.0–2.0 pt

15G: 8 oz per 1000 ft of row

24

75WG: 21—

ears, forage

15G: at planting

Do not feed treated corn silage, forage, or fodder, or allow livestock to graze. Do not make more than 3 applications of any product containing chlorpyrifos per season.

 

3A

*Asana XL

(esfenvalerate)

5.8–9.6 fl oz

12

1

Maximum of 0.5 lb a.i./acre per season (10 applications at highest rate).

 

3A

*Brigade 2EC

(bifenthrin)

2.1–6.4 fl oz

12

1

Maximum of 12.8 fl oz/acre per season. Many other brands available with same active ingredient.

 

3A

*Capture LFR

(bifenthrin)

4.0–5.3 fl oz (preplant incorporated); 3.4–13.6 fl oz (at plant); 3.4 fl oz

(preemergence)

12

preplant incorporated, at planting, preemergence application

For mixing with liquid fertilizer. Maximum of 0.2 lb a.i./acre per season of all bifenthrin products. Many other brands available with same active ingredient.

 

3A

*Mustang Maxx

(zeta-cypermethrin)

2.8–4.0 fl oz

12

3

Maximum of 24 fl oz/acre per season.

 

3A

PyGanic Crop Protection EC 5.0 (pyrethrins)

4.5–15.6 fl oz

12

0

Thorough coverage is essential. Breaks down rapidly in sunlight. OMRI-listed2.

 

3A, 3A

*Hero Insecticide (bifenthrin, zeta- cypermethrin)

4.0–10.3 fl oz

12

3

Maximum of 27.39 fl oz/acre per season (0.266 lb a.i.). See label when using more than one product containing bifenthrin or zeta-cypermethrin.

 

4A

Assail 30SG

(acetamiprid)

2.1–2.9 oz

12

1

Maximum of 11.2 oz/acre per growing season. Do not exceed 2 crop seasons per year.

 

4A, 15

Cormoran

(acetamiprid, novaluron)

9–12 fl oz

12

7

Maximum of 40 fl oz/acre per season or 0.21 lb a.i. acetamiprid and 0.39 lb a.i. novaluron/acre per year.

 

4C

Transform WG

(sulfoxaflor)

0.75–1.5 oz

24

7

Maximum of 3.0 oz/acre per year.

 

4D

Sivanto Prime

(flupyradifurone)

7.0–14.0 fl oz

4

7—ears and forage

21—stover

Maximum of 28 fl oz/acre per year.

 

-

Aza-Direct

(azadirachtin)

1–3.5 pt

4

0

Antifeedant, repellant, insect growth regulator. OMRI-listed2.

 

-

Azatin XL

(azadirachtin)

5–21 fl oz

4

0

Antifeedant, repellant, insect growth regulator.

 

-

BotaniGard ES

Mycotrol ESO

(Beauveria bassiana strain GHA)

0.25–1 qt

4

0

Apply in sufficient water to cover foliage, typically 5–100 gallon/acre. Compatible in tank mix with some fungicides. Mycotrol ESO OMRI-listed2.

 

-

Grandevo (Chromobacterium subtsugae strain PRAA4-1)

2–3 lb

4

0

OMRI-listed2.

 

-

Molt-X

(azadirachtin)

10 fl oz

4

0

OMRI-listed2.

 

-

Neemix 4.5

(azadirachtin)

4–16 fl oz

4

0

OMRI-listed2.

 

-

Oil, insecticidal (e.g., Suffoil-X)

1–2 gal/100 gal, depending on brand

4

0

OMRI-listed2, depending on brand.

 

-

Trilogy

(extract of neem oil)

1.0%–2.0% v/v

4

0

Apply morning or evening to reduce potential for leaf burn. Toxic to bees exposed to direct treatment.

Beetles (includes banded cucumber beetle, flea beetles, sap beetles, seed corn beetle)

1A

*Lannate LV

*Lannate SP (methomyl)

LV: 0.75–1.5 pt

SP: 0.25–0.50 lb

48

0—ears

3—forage

21—stover

Certain hybrid varieties are susceptible to methomyl injury. Treat a small area to determine safety first.

1A

Sevin 4F

XLR Plus

(carbaryl)

1–2 qt

24 (21 days for detasseling workers)

2— ears

14—forage

48—fodder

Maximum of 16 qt/acre per crop per year. Highly toxic to bees.

1B, 3A

*Cobalt Advanced

(chlorpyrifos, lambda-cyholothrin

6–42 fl oz

24

21

See label for application methods and many restrictions.

1B

*Counter 15G Lock 'N Load

(terbufos)

6.0–8.0 oz per 1000 ft of row, banded or in furrow; postemergence incorporated, 8 oz per 1000 ft of row at cultivation

48

60

Only one application (at planting, postemergence incorporated, or cultivation time treatment) per season. Do not exceed 8.7 lb/acre. 20G formulation also available.

1B

Fyfanon

Fyfanon 57% EC

ULV AG

(malathion)

Fyfanon, 57% EC: 1.5 pt

ULV AG: 4–8 fl oz

12

5

Maximum of 2 applications per year. Crop injury may occur in the whorl to silking stages.

1B

*Thimet 20-G

(phorate)

4.5–6.0 oz per 1000 ft of row

48

at planting

One application per season, no more than 6.5 lb/acre per season.

3A

*Ambush 25W

(permethrin)

6.4–16.0 oz

12

1

Do not apply more than 2.0 lb a.i./acre per season. Rates above 12.8 oz are for Florida only.

3A

*Asana XL

(esfenvalerate)

5.8–9.6 fl oz

12

1

Maximum of 0.5 lb a.i./acre per season (10 applications at highest rate).

3A

*Baythroid XL

(beta-cyfluthrin)

0.8–2.8 fl oz

12

0

Maximum of 28 fl oz/acre per season. Maximum of 10 applications.

3A

*Brigade 2EC

(bifenthrin)

2.1–6.4 fl oz

12

1

Maximum of 12.8 fl oz/acre per season. Many other brands available with same active ingredient.

3A

*Capture LFR

(bifenthrin)

4.0–5.3 fl oz (preplant incorporated);

3.4–13.6 fl oz (at plant);

3.4 fl oz (preemergence)

12

preplant incorporated, at planting, preemergence application

For mixing with liquid fertilizer. Maximum of 0.2 lb a.i./acre per season of all bifenthrin products. Many other brands available with same active ingredient.

3A

*Declare

(gamma-cyhalothrin)

1.02–1.54 fl

24

1—ears,

21—fodder

Maximum of 24.6 fl oz/acre per crop.

3A

*Forece 3G

(tefluthrin)

variable depending on row spacing

0

at planting or cultivation within 30 days of seedling emergence

Only one application per crop. Granules must be incorporated.

3A

*Mustang Maxx

(zeta-cypermethrin)

2.24–4.0 fl oz

12

3

Maximum of 24 fl oz/acre per season.

3A

PyGanic Crop

Protection EC 5.0

(pyrethrins)

4.5–15.6 fl oz

12

0

Thorough coverage is essential. Breaks down rapidly in sunlight. OMRI-listed2.

3A

*Warrior II

(lambda-cyhalothrin)

0.33 fl oz/1000 ft of row (at plant); 1.28–1.92 fl oz (foliar)

24

1—ears (foliar),

21 for feeding livestock or at plant applications

Maximum of 30.72 fl oz/acre per crop. Many other brands with same active ingredient are available.

3A

*Hero Insecticide

(bifenthrin, zeta-cyhalothrin)

4.0–10.3 fl oz

12

3

Maximum of 27.39 fl oz/acre per season (0.266 lb a.i.). See label when using more than one product containing bifenthrin or zeta-cypermethrin.

3A, 28

*Besiege

(lambda-cyhalothrin, chlorantraniliprole)

6–10 fl oz

24

1

Maximum of 31 fl oz/acre per year.

4A

Assail 30 SG

(acetamiprid)

4.0–5.3 oz

12

7

Maximum of 11.2 oz/acre per growing season. Do not exceed 2 crop seasons per year.

4A, 15

Cormoran (acetamiprid, novaluron)

9–12 fl oz

12

7

Maximum of 40 fl oz/acre per season or 0.21 lb a.i. acetamiprid and 0.39 lb a.i. novaluron/acre per year.

15

Rimon 0.83EC

(novaluron)

6–12 fl oz

12

1

Maximum of 60 fl oz/acre per season.

-

Aza-Direct

(azadirachtin)

1–3.5 pt

4

0

Antifeedant, repellant, insect growth regulator. OMRI-listed2.

-

Azatin XL

(azadirachtin)

5–21 fl oz

4

0

Antifeedant, repellant, insect growth regulator.

-

Grandevo (Chromobacterium subtsugae strain PRAA4-1)

2–3 lb

4

0

OMRI-listed2.

Caterpillars

(includes beet armyworm, corn borer, corn earworm, cutworms, fall armyworm, webworms)

1A

*Lannate LV,

*Lannate SP

(methomyl)

LV: 0.75–1.5 pt

SP: 0.25–0.50 lb

48

0—ears

3—forage

21—stover

Certain hybrid varieties are susceptible to methomyl injury. Treat a small area to determine safety first.

1A

*Methomyl 5G

(methomyl)

1.5–3.0 lb

48

3—forage

21—ears

For corn earworm and fall armyworm control. Apply as a banded application, directing granules to the whorl of the plants. Apply from the 4th leaf stage until tasseling. Maximum of 30 lb/acre or 5 applications per season.

1A

Sevin 4F

XLR Plus

(carbaryl)

1–2 qt

24 (21 days for detasseling workers)

2—ears

14—forage

48—fodder

Maximum of 16 qt/acre per crop per year. Highly toxic to bees.

1B, 3A

*Cobalt Advanced

(chlorpyrifos, lambda-cyhalothrin)

6–42 fl oz

24

21

See label for application methods and many restrictions.

1B

*Counter 15G Lock ‘n Load

(terbufos)

6.0–8.0 oz per 1000 ft of row, banded or in furrow; postemergence incorporated,

8 oz per 1000 ft of row at cultivation

48

60

Only one application (at planting, postemergence incorporated, or cultivation time treatment) per season. Do not exceed 8.7 lb/acre. 20G formulation also available.

1B

Fyfanon

Fyfanon 57% EC

(malathion)

1.5 pt

12

5

Maximum of 2 applications per year. Crop injury may occur in the whorl to silking stages.

1B

Lorsban 75WG

*Advanced

15G

(chlorpyrifos)

75WG: 0.33–1.33 lb

Advanced: 1.0–2.0 pt; 15G: 8 oz per 1000 ft of row

24

75WG:

21—ears, forage

15G: at planting

Do not feed treated corn silage, forage, or fodder, or allow livestock to graze. Do not make more than 3 applications of any product containing chlorpyrifos per season. See 24(c) SLN for Lorsban Advanced for control of beet armyworm, fall armyworm, and corn earworm larvae (7 day PHI).

1B

*Mocap 15G

(ethoprop)

See label.

48

at planting

One application per growing season.

3A

*Ambush 25W

(permethrin)

6.4–16.0 oz

12

1

Do not apply more than 2.0 lb a.i./acre per season. Rates above 12.8 oz are for Florida only.

3A

*Asana XL

(esfenvalerate)

5.8–9.6 fl oz

12

1

Maximum of 0.5 lb a.i./acre per season (10 applications at highest rate).

3A

*Baythroid XL

(beta-cyfluthrin)

0.8–2.8 fl oz

12

0

Maximum of 28 fl oz/acre per season. Maximum of 10 applications.

3A

*Brigade 2EC

(bifenthrin)

0.15–0.30 fl oz/1000 ft of row (in-furrow T-band at plant); 2.1–6.4 fl oz (foliar)

12

1

Maximum of 12.8 fl oz/acre per season. Many other brands available with same active ingredient.

3A

*Capture LFR

(bifenthrin)

4.0–5.3 fl oz (preplant incorporated);

3.4–13.6 fl oz (at plant);

3.4 fl oz (preemergence)

12

preplant incorporated, at planting, preemergence application

For mixing with liquid fertilizer. Maximum of 0.2 lb a.i./acre per season of all bifenthrin products. Many other brands available with same active ingredient.

3A

*Declare

(gamma-cyhalothrin)

1.02–1.54 fl oz

24

1—ears,

21—fodder

Maximum of 24.6 fl oz/acre per crop.

3A

*Force 3G

(tefluthrin)

Depends on row spacing

0

at planting or cultivation within 30 days of seedling emergence

Only one application per crop. Granules must be incorporated.

3A

*Mustang Maxx

(zeta-cypermethrin)

2.24–4.0 fl oz

12

3

Maximum of 24 fl oz/acre per season.

3A

PyGanic Crop

Protection EC 5.0

(pyrethrins)

4.5–15.6 fl oz

12

0

Thorough coverage is essential. Breaks down rapidly in sunlight. OMRI-listed2.

3A

*Warrior II

(lambda-cyhalothrin)

0.33 fl oz/1000 ft of row (at plant); 1.28–1.92 fl oz (foliar)

24

1—ears (foliar), 21 for feeding livestock or at plant applications

Maximum of 30.72 fl oz/acre per crop. Many other brands with same active ingredient are available.

3A, 3A

*Hero Insecticide

(bifenthrin, zeta-cypermethrin)

4.0–10.3 fl oz

12

3

Maximum of 27.39 fl oz/acre per season (0.266 lb a.i.). See

label when using more than one product containing bifenthrin or zeta-cypermethrin.

3A, 28

*Besiege

(lambda-cyhalothrin, chlorantraniliprole)

6–10 fl oz

24

1

Maximum of 31 fl oz/acre per year.

4A, 15

Cormoran

(acetamiprid, novaluron)

9–12 fl oz

12

7

Maximum of 40 fl oz/acre per season or 0.39 lb a.i. novaluron and 0.21 lb a.i. acetamiprid/acre per year.

5

Entrust SC

(spinosad)

1.5–6.0 fl oz

4

1—ears,

7—forage,

28—fodder

Maximum of 29 fl oz/acre per year or 6 applications.

OMRI-listed2.

5

Radiant SC

(spinetoram)

3–6 fl oz

4

1—ears,

3—forage or fodder

Maximum of 36 fl oz/acre per year or 6 applications.

5, 18

Intrepid Edge

(spinetoram, methoxyfenozide)

4–12 fl oz

4

3—ears and methoxyfenozide, fodder

Maximum of 51 fl oz/acre per year (1 lb a.i. forage, 21 dry 0.2 lb a.i. spinetoram) or 6 applications.

11A

Agree WG

(Bacillus thuringiensis subspecies aizawai)

1.0–2.0 lb

4

0

Apply when larvae are small for best control. OMRI-listed2.

11A

Biobit HP

(Bacillus thuringiensis subspecies kurstaki)

0.5–2.0 lb

4

0

Treat when larvae are young. Good coverage is essential.

Can be used in the greenhouse. OMRI-listed2.

11A

Crymax WDG

(Bacillus thuringiensis subspecies kurstaki)

0.5–2.0 lb

4

0

Use high rate for armyworms. Treat when larvae are young.

Not for organic production.

11A

Deliver

(Bacillus thuringiensis subspecies kurstaki)

0.25–1.5 lb

4

0

Use higher rates for armyworms. OMRI-listed2.

11A

DiPel DF (Bacillus thuringiensis subspecies kurstaki)

0.5–2.0 lb

4

0

Treat when larvae are young. Good coverage is essential.

For organic production.

11A

Javelin WG

(Bacillus thuringiensis subspecies kurstaki)

0.12–1.50 lb

4

0

Treat when larvae are young. Thorough coverage is essential. OMRI-listed2.

11A

Xentari DF

(Bacillus thuringiensis subspecies aizawai)

0.5–2.0 lb

4

0

Treat when larvae are young. Thorough coverage is essential. May be used in the greenhouse. Can be used in organic production.

15

Rimon 0.83EC

(novaluron)

6–12 fl oz

12

1

Maximum of 60 fl oz/acre per season.

18

Intrepid 2F

(methoxyfenozide)

4–16 fl oz

4

3—ears and forage

21—dry fodder

Maximum of 64 fl oz/acre per year.

22

Avaunt, Avaunt eVo (indoxacarb)

2.5–3.5 oz

12 (14 days for hand harvesting)

3—ears

35—fodder and stover

Whorl stage through tassel push applications only. Maximum of 14 oz/acre per crop, or 4 applications/acre per crop, or 42 oz/acre per year.

28

Coragen

(chlorantraniliprole)

3.5–7.5 fl oz

4

1

Foliar only. Maximum of 15.4 fl oz/acre, or 4 applications, or 0.2 lb a.i./acre chlorantraniliprole per year.

-

Aza-Direct

(azadirachtin)

1–3.5 pt

4

0

Antifeedant, repellant, insect growth regulator. OMRI-listed2.

-

Azatin XL

(azadirachtin)

5–21 fl oz

4

0

Antifeedant, repellant, insect growth regulator.

-

Grandevo (Chromobacterium subtsugae strain PRAA4-1)

1–3 lb

4

0

OMRI-listed2

-

Molt-X

(azadirachtin)

10 fl oz

4

0

OMRI-listed2

-

Neemix 4.5

(azadirachtin)

4–16 fl oz

4

0

OMRI-listed2

-

Oil, insecticidal

1–2 gal/100 gal, depending on brand

4

0

 

Chinch bugs

1A

Sevin 4F; XLR Plus

(carbaryl)

1–2 qt

24 (21 days for detasseling workers)

2—ears,

14—forage,

48—fodder

Maximum of 16 qt/acre per crop per year. Highly toxic to bees.

1B, 3A

*Cobalt Advanced

(chlorpyrifos, lambda-cyhalothrin)

6–42 fl oz

24

21

See label for application methods and many restrictions.

1B

*Counter 15G Lock ‘n Load

(terbufos)

6.0–8.0 oz per 1000 ft of row, banded or in furrow; postemergence incorporated,

8 oz per 1000 ft of row at cultivation

48

60

Only one application (at-planting, postemergence incorporated, or cultivation time treatment) per season. Do not exceed 8.7 lb/acre. 20G formulation also available.

3A

*Asana XL

(esfenvalerate)

5.8–9.6 fl oz

12

1

Maximum of 0.5 lb a.i./acre per season (10 applications at highest rate).

3A

*Baythroid XL

(beta-cyfluthrin)

0.8–2.8 fl oz

12

0

Maximum of 28 fl oz/acre per season. Maximum of 10 applications.

3A

*Brigade 2EC

(bifenthrin)

2.1–6.4 fl oz

12

1

Maximum of 12.8 fl oz/acre per season. Many other brands available with same active ingredient.

3A

*Force 3G

(tefluthrin)

depends on row spacing

0

at planting or cultivation within 30 days of seedling emergence

Only one application per crop. Granules must be incorporated.

3A

*Mustang Maxx

(zeta-cypermethrin)

2.24–4.0 fl oz

12

3

Maximum of 24 fl oz/acre per season.

3A

*Warrior II

(lambda-cyhalothrin)

1.28–1.92 fl oz

24

1—ears

21—feeding livestock

Maximum of 30.72 fl oz/acre per crop. Many other brands with same active ingredient are available.

3A, 3A

*Hero Insecticide

(bifenthrin, zeta-cypermethrin)

4.0–10.3 fl oz

12

3

Maximum of 27.39 fl oz/acre per season (0.266 lb a.i.). See label when using more than one product containing bifenthrin or zeta-cypermethrin.

3A, 28

*Besiege

(lambda-cyhalothrin, chlorantraniliprole)

6–10 fl oz

24

1

Maximum of 31 fl oz/acre per year.

-

Grandevo

(Chromobacterium subtsugae strain PRAA4-1)

2–3 lb

4

0

OMRI-listed2.

Corn silkflies

1B

Fyfanon ULV AG

(malathion)

6–8 fl oz

12

5

Ultra low volume (ULV) formulation. Maximum of 2 applications per year.

3A

*Asana XL

(esfenvalerate)

9.6 fl oz

12

1

Maximum of 0.5 lb a.i./acre per season (10 applications at highest rate).

3A

*Baythroid XL

(beta-cyfluthrin)

0.8–2.8 fl oz

12

0

Maximum of 28 fl oz/acre per season. Maximum of 10 applications.

3A

*Mustang Maxx

(zeta-cypermethrin

2.24–4.0 fl oz

12

3

Maximum of 24 fl oz/acre per season.

3A

*Warrior II

(lambda-cyhalothrin)

1.92 fl oz

24

1—ears

21—feeding livestock

Maximum of 30.72 fl oz/acre per crop. Many other brands with same active ingredient are available.

3A, 28

*Besiege

(lambda-cyhalothrin, chlorantraniliprole)

10 fl oz

24

1

Maximum of 31 fl oz/acre per year.

3A, 3A

*Hero Insecticide

(bifenthrin, zeta-cypermethrin)

4.0–10.3 fl oz

12

3

Maximum of 27.39 fl oz/acre per season (0.266 lb a.i.). See

label when using more than one product containing bifenthrin or zeta-cypermethrin.

4A

Assail 30SG

(acetamiprid)

4.0–5.3 oz

12

7

Maximum of 11.2 oz/acre per growing season. Do not exceed 2 crop seasons per year.

4A, 15

Cormoran (acetamiprid, novaluron)

12 fl oz

12

7

Maximum of 40 fl oz/acre per season or 0.21 lb a.i. acetamiprid and 0.39 lb a.i. novaluron/acre per year.

Fire ants

3A

*Force 3G Insecticide

(tefluthrin)

depends on row spacing

0

at planting or cultivation within 30 days of seedling emergence

Only one application per crop. Granules must be incorporated.

7A

Extinguish

(S-methoprene)

1–1.5 lb

4

0

Slow-acting insect growth regulator (IGR). Best applied early spring and fall where crop will be grown. Colonies will be reduced after three weeks and eliminated after 8 to 10 weeks. May be applied by ground equipment or aerially.

Grasshoppers

1B, 3A

*Cobalt Advanced

(chlorpyrifos, lambda-cyhalothrin)

6–42 fl oz

24

21

See label for application methods and many restrictions.

1B

Fyfanon

Fyfanon 57% EC

(malathion)

1.5 pt

12

5

Maximum of 2 applications per year. Crop injury may occur in the whorl to silking stages.

1B

Lorsban 75WG *Advanced

15G

(chlorpyrifos)

75WG: 0.33–1.33 lb

Advanced: 0.5–2.0 pt

15G: 8 oz per 1000 ft of row

24

75WG: 21—ears, forage

15G: at planting

Do not feed treated corn silage, forage, or fodder, or allow livestock to graze. Do not make more than 3 applications of any product containing chlorpyrifos per season.

3A

*Asana XL

(esfenvalerate)

5.8–9.6 fl oz

12

1

Maximum of 0.5 lb a.i./acre per season (10 applications at

highest rate).

3A

*Baythroid XL

(beta-cyfluthrin)

0.8–2.8 fl oz

12

0

Maximum of 28 fl oz/acre per season. Maximum of 10 applications.

3A

*Brigade 2EC

(bifenthrin)

2.1–6.4 fl oz

12

1

Maximum of 12.8 fl oz/acre per season. Many other brands available with same active ingredient.

3A

*Mustang

(zeta-cypermethrin)

2.8–4.0 fl oz

12

3

Maximum of 24 fl oz/acre per season.

3A

*Warrior II

(lambda-cyhalothrin)

1.28–1.92 fl oz

24

1—ears

21—feeding livestock

Maximum of 30.72 fl oz/acre per crop. Many other brands with same active ingredient are available.

3A, 3A

*Hero Insecticide

(bifenthrin, zeta-cypermethrin)

4.0–10.3 fl oz

12

3

Maximum of 27.39 fl oz/acre per season (0.266 lb a.i.). See label when using more than one product containing bifenthrin or zeta-cypermethrin.

3A, 28

*Besiege

(lambda-cyhalothrin, chlorantraniliprole)

6–10 fl oz

24

1

Maximum of 31 fl oz/acre per year.

4A, 15

Cormoran (acetamiprid, novaluron)

9–12 fl oz

12

7

Maximum of 40 fl oz/acre per season or 0.21 lb a.i. acetamiprid and 0.39 lb a.i. novaluron/acre per year.

15

Rimon 0.83EC

(novaluron)

6–12 fl oz

12

1

Maximum of 60 fl oz/acre per season.

28

Coragen

(chlorantraniliprole)

2.0–5.0 fl oz

4

1

Foliar only. Maximum of 15.4 fl oz/acre, or 4 applications, or 0.2 lb a.i./acre chlorantraniliprole per year.

Leafhoppers

1A

Sevin 4F; XLR Plus

(carbaryl)

1–2 qt

24 (21 days for detasseling workers)

2—ears

14—forage

48—fodder

Maximum of 16 qt/acre per crop per year. Highly toxic to bees.

1B

Fyfanon, Fyfanon 57% EC

(malathion)

1.5 pt

12

5

Maximum of 2 applications per year. Crop injury may occur in the whorl to silking stages.

3A

*Ambush 25W

(permethrin)

6.4–16.0 oz

12

1

Do not apply more than 2.0 lb a.i./acre per season. Rates above 12.8 oz are for Florida only.

3A

*Mustang Maxx

(zeta-cypermethrin)

2.24–4.0 fl oz

12

3

Maximum of 24 fl oz/acre per season.

3A

PyGanic Crop Protection EC 5.0 (pyrethrins)

4.5–15.6 fl oz

12

0

Thorough coverage is essential. Breaks down rapidly in sunlight. OMRI-listed2.

3A

*Warrior II

(lambda-cyhalothrin)

1.28–1.92 fl oz

24

1—ears

21—feeding livestock

Maximum of 30.72 fl oz/acre per crop. Many other brands with same active ingredient are available.

3A, 3A

*Hero Insecticide

(bifenthrin, zeta-cypermethrin)

4.0–10.3 fl oz

12

3

Maximum of 27.39 fl oz/acre per season (0.266 lb a.i.). See label when using more than one product containing bifenthrin or zeta-cypermethrin.

3A, 28

*Besiege

(lambda-cyhalothrin, chlorantraniliprole)

6–10 fl oz

24

1

Maximum of 31 fl oz/acre per year.

4D

Sivanto Prime

(flupyradifurone)

7.0–14.0 fl oz

4

7—ear and forage

21—stover

Maximum of 28 fl oz/acre per year.

-

Aza-Direct

(azadirachtin)

1–3.5 pt

4

0

Antifeedant, repellant, insect growth regulator. OMRI-listed2.

-

Molt-X

(azadirachtin)

10 fl oz

4

0

OMRI-listed2.

Soil pests (includes corn rootworms, seed corn maggot, white grubs, wireworms)

1A

*Lannate LV

*Lannate SP

(methomyl)

LV: 0.75–1.5 pt

SP: 0.25–0.50 lb

48

0—ears

3—forage

21—stover

Certain hybrid varieties are susceptible to methomyl injury. Treat a small area to determine safety first.

1A

Sevin 4F

XLR Plus

(carbaryl)

1–2 qt

24 (21 days for detasseling workers)

2—ears

14—forage

48—fodder

Maximum of 16 qt/acre per crop per year. Highly toxic to bees.

1B, 3A

*Cobalt Advanced

(chlorpyrifos, lambda-cyhalothrin)

6–42 fl oz

24

21

See label for application methods and many restrictions.

1B

*Counter 15G Lock ‘n Load

(terbufos)

6.0–8.0 oz per 1000 ft of row, banded or in furrow; postemergence incorporated,

8 oz per 1000 ft of row at cultivation

48

60

Only one application (at-planting, postemergence incorporated, or cultivation time treatment) per season. Do not exceed 8.7 lb/acre. 20G formulation also available.

1B

Lorsban 75WG

*Advanced

15G

(chlorpyrifos)

75WG: 0.33–1.33 lb

Advanced: 0.5–2.0 pt

15G: 8 oz per 1000 ft of row

24

75WG: 21—ears, forage

15G: at planting

Do not feed treated corn silage, forage, or fodder, or allow livestock to graze. Do not make more than 3 applications of any product containing chlorpyrifos per season.

1B

*Mocap 15G

(ethoprop)

See label

48

at planting

One application per growing season.

1B

*Thimet 20-G

(phorate)

4.5–6.0 oz/1000 ft of row at planting or cultivation

48

30—ears, forage

Maximum of 6.5 lb/acre per season or one application.

3A

*Asana XL

(esfenvalerate)

5.8–9.6 fl oz

12

1

Do not apply more than 0.5 lb a.i./acre per season (10 applications at highest rate).

3A

*Baythroid XL

(beta-cyfluthrin)

0.8–2.8 fl oz

12

0

Maximum of 28 fl oz/acre per season. Maximum of 10 applications.

3A

*Brigade 2EC

(bifenthrin)

0.15–0.30 fl oz/1000 ft of row (in-furrow T-band at plant); 2.1–6.4 fl oz (foliar)

12

1

Maximum of 12.8 fl oz/acre per season. Many other brands available with same active ingredient.

3A

*Capture LFR

(bifenthrin)

4.0–5.3 fl oz (preplant incorporated); 3.4–17.0 fl oz (at plant); 3.4 fl oz (preemergence)

12

preplant incorporated at planting, preemergence application

For mixing with liquid fertilizer. Maximum of 0.2 lb a.i./acre, per season of all bifenthrin products. Many other brands available with same active ingredient.

3A

*Force 3G

(tefluthrin)

depends on row spacing

0

at planting or cultivation within 30 days of seeding emergence

Only one application per crop. Granules must be incorporated.

3A

*Warrior II

(lambda-cyhalothrin)

0.33 fl oz/1000 ft of row (at plant); 1.28–1.92 fl oz (foliar)

24

1— ears (foliar),

21 for feeding livestock or at plant applications

Maximum of 30.72 fl oz/acre per crop. Many other brands with same active ingredient are available.

3A, 28

*Besiege

(lambda-cyhalothrin, chlorantraniliprole)

6–10 fl oz

24

1

Maximum of 31 fl oz/acre per year.

-

Oil, insecticidal

1–2 gal/100 gal, depending on brand

4

0

 

Spider mites

1B

*Thimet 20-G

(phorate)

4.5–6.0 oz per 1000 ft of row

48

at planting, see label

One application per season, no more than 6.5 lb/acre per season.

3A

*Brigade 2EC

(bifenthrin)

5.12–6.4 fl oz

12

1

Maximum of 12.8 fl oz/acre per season. Many other brands available with same active ingredient.

3A, 3A

*Hero Insecticide

(bifenthrin, zetacypermethrin)

10.3 fl oz

12

3

Maximum of 27.39 fl oz/acre per season (0.266 lb a.i.). See label when using more than one product containing bifenthrin or zeta-cypermethrin.

6

*Agri-Mek SC

(abamectin)

1.75–3.50 fl oz

12

7

Maximum of 7 fl oz/acre per year. No more than 2 sequential applications. Must be mixed with an adjuvant. Highly toxic to foraging bees.

23

Oberon 2SC

(spiromesifen)

5.7–16 fl oz

12

5—ears, green forage, silage

30—grain or stover

Maximum of 17 fl oz/acre per season or no more than two applications.

-

Aza-Direct

(azadirachtin)

1–3.5 pt

4

0

Antifeedant, repellant, insect growth regulator. OMRI-listed2.

-

Trilogy

(extract of neem oil)

1.0%–2.0% v/v

4

0

Apply morning or evening to reduce potential for leaf burn.

Toxic to bees exposed to direct treatment.

-

Grandevo

(Chromobacterium subtsugae strain PRAA4-1)

2–3 lb

4

0

OMRI-listed2.

Tarnished plant bug

3A

*Asana XL

(esfenvalerate)

5.8–9.6 fl oz

12

1

Maximum of 0.5 lb a.i./acre per season (10 applications at

highest rate).

3A

*Brigade 2EC

(bifenthrin)

2.1–6.4 fl oz

12

1

Maximum of 12.8 fl oz/acre per season. Many other brands available with same active ingredient.

3A

*Warrior II

(lambda-cyhalothrin)

1.28–1.92 fl oz

24

1—ears,

21—feeding livestock

Maximum of 30.72 fl oz/acre per crop. Many other brands with same active ingredient are available.

3A, 28

*Besiege

(lambda-cyhalothrin, chlorantraniliprole)

6–10 fl oz

24

1

Maximum of 31 fl oz/acre per year.

Thrips (check label for species controlled)

1B

*Counter 15G Lock ‘n Load

(terbufos)

6.0–8.0 oz per 1000 ft of row, banded or in furrow; postemergence incorporated,

8 oz per 1000 ft of row at cultivation

48

60

Only one application (at-planting, post-emergence incorporated, or cultivation time treatment) per season. Do not exceed 8.7 lb/acre. 20G formulation also available.

1B

Fyfanon

Fyfanon 57% EC

(malathion)

1.5 pt

12

5

Maximum of 2 applications per year. Crop injury may occur in the whorl to silking stages.

3A

PyGanic Crop

Protection EC 5.0

(pyrethrins)

4.5–15.6 fl oz

12

0

Thorough coverage is essential. Breaks down rapidly in sunlight. OMRI-listed2.

-

Aza-Direct

(azadirachtin)

1–3.5 pt

4

0

Antifeedant, repellant, insect growth regulator. OMRI-listed2.

-

Azatin XL

(azadirachtin)

5–21 fl oz

4

0

Antifeedant, repellant, insect growth regulator.

-

Trilogy

(extract of neem oil)

1.0%–2.0% v/v

4

0

Apply morning or evening to reduce potential for leaf burn.

Toxic to bees exposed to direct treatment.

-

BotaniGard ES, Mycotrol ESO (Beauveria bassiana strain GHA)

0.2–1 qt

4

0

Apply in sufficient water to cover foliage, typically 5–100 gallon/ acre. Compatible in tank mix with some fungicides. Mycotrol ESO OMRI-listed2.

-

Grandevo

(Chromobacterium subtsugae strain PRAA4-1)

2–3 lb

4

0

OMRI-listed2.

-

Molt-X

(azadirachtin)

10 fl oz

4

0

OMRI-listed2.

-

Oil, insecticidal

(e.g., Suffoil-X)

12 gal/100 gal, depending on brand

4

0

OMRI-listed2, depending on brand.

Weevils

-

Aza-Direct

(azadirachtin)

1–3.5 pt

4

0

Antifeedant, repellant, insect growth regulator. OMRI-listed2.

 

-

Azatin XL

(azadirachtin)

5–21 fl oz

4

0

Antifeedant, repellant, insect growth regulator.

1 Mode of Action (MOA) codes for plant pest insecticides from the Insecticide Resistance Action Committee (IRAC) Mode of Action Classification v. 9.4 March 2020. Number codes (1 through 29) are used to distinguish the main insecticide mode of action groups, with additional letters for certain subgroups within each main group. All insecticides within the same group (with same number) indicate the same active ingredient or similar mode of action. This information must be considered for the insecticide resistance management decisions. - = unknown, or a mode of action that has not been classified yet.

2 Information provided in this table applies only to Florida. Be sure to read a current product label before applying any product. The use of brand names and any mention or listing of commercial products or services in the publication does not imply endorsement by UF/IFAS Extension nor discrimination against similar products or services not mentioned. OMRI-listed: Listed by the Organic Materials Review Institute for use in organic production.

* Restricted use insecticide.

Table 6. 

Sweet corn fungicides ordered by disease and then FRAC group according to their mode of action.

Pertinent Diseases or Pathogens

Fungicide Group1

Chemical

(Active Ingredients)

Max Rate/Acre

Min. Days to

Remarks2

Appl.

Season

Harvest

Reentry

Labels change frequently. Be sure to read a current product label before applying any chemical.

Please refer to Chapter 19 for information on biopesticides, including materials labeled for certified organic production.

Bacterial stalk rot

M1

(copper compounds)

Many brands available: Badge X2, Copper Count N, Cueva, Kocide 2000, Kocide 3000, Mastercop, Nu-Cop 50 DF, Top Cop w/Sulfur

SEE INDIVIDUAL LABELS

1

Varies by product from 4 hr to 2 days

 

Powdery mildew rust

M2

(Sulfur)

Many brands available: Kumulus DF, Microfine Sulfur, Sulfur 90W, Top Cop w/Sulfur, Yellow Jacket Wettable Sulfur

SEE INDIVIDUAL LABELS

1

1

Do not apply during periods of warm weather.

Do not apply within 2 weeks of an oil spray.

Northern blight

Southern blight Common rust

M3

(mancozeb)

Many brands available: Dithane DF Rainshield, Dithane F-45 Rainshield, Dithane M45, Koverall, Manzate DF, Manzate Flowable, Manzate Pro-Stick, Penncozeb 4FL, Penncozeb 75DF, Penncozeb 80WP, Roper DF Rainshield

1.5 lb

24 lb

7

1

Start applications at the first sign of disease.

M5

(chlorothalonil)

Many brands available: Bravo Ultrex, Bravo Weather Stik, Chloronil 720, Chlorothalonil 720 SC, Echo 720, Echo 90DF, Echo ZN, Equus 500 ZN, Equus 720 SST, Equus DF, Initiate 720, Initiate ZN

SEE INDIVIDUAL LABELS

7

0.5

 

3

(propiconazole)

Many brands available: Amtide propiconizole 41.8, Bumper 41.8EC, Fitness, Propiconazole E-AG 41.8EC, Propicure 3.6F, Propimax EC, Propi-Star EC, Shar-Shield PPZ, Tide Propiconazole

41.8 EC, Tilt 3.6EC, Topaz

4 fl oz

16 fl oz

14

0.5

Do not exceed 4 total applications.

3

(tebuconazole)

Many brands available: Folicur 3.6F, Monsoon 3.6F, Onset 3.6L, Orius 3.6F, Tebu-Crop, Tebustar 3.6L, Tebuzol 3.6F, Toledo 3.6F

6 fl oz

24 fl oz

7

0.5

Restricted-entry time is 19 days.

3

Prosaro

(tebuconazole + prothioconazole)

8.2 fl oz

26 fl oz

7

0.5

See label for adjuvant information and rotational restrictions.

3 & 7

Populse

(prothoconazole + fluopyram)

27.4 fl oz

13.7 fl oz

0

0.5

Do not make more than 2 sequential applications.

3 & 33

Viathon

(tebuconazole + potassium phosphite)

3.0 pt

16.5 pt

7

0.5

See label for details and rotational restrictions.

3 & M2

Unicorn

(tebuconazole & sulfur)

3.75 lb

15.0 lb

14

19

See label for details and rotational restrictions.

7

Vertisan

(penthiopyrad)

24 fl oz

48 fl oz

7

0.5

Soil and foliar treatments.

7

Luna Privilege

(fluopyram)

6.8 fl oz

13.6 fl oz

7

0.5

Alternate with fungicides of dissimilar modes of action.

7 & 11

Elatus

(benzovindiflupyr + azoxystrobin)

7.3 oz

14.6 fl oz

7

0.5

Alternate with fungicides of dissimilar modes of action.

3 & 7

& 11

Trivapro

(propiconazole + benzovindiflupyr + azozystrobin)

13.7 fl oz

54.8 fl oz

14

0.5

Use no more than 2 sequential applications before alternating with a fungicide of dissimilar mode of action.

3 & 7

& 11

Miravis Neo

(pydiflumetofen; azoxystrobin; propiconazole)

13.7 fl oz

44.5 fl oz

14

0.5

Do not make more than 2 sequential applications.

11

Aftershock

(fluoxastrobin)

0.24 fl oz per 1000 ft of row in soil, 3.8 fl oz foliarly

22.8 fl oz infurrow or 7.6 fl oz foliarly

 

0.5

Soil and foliar treatments.

11

Aproach

(picoxystrobin)

12 fl oz

36 fl oz

7

0.5

See label for details.

11

Evito 480SC

(fluoxastrobin)

3.8 fl oz

15.2 fl oz

7

0.5

Do not exceed 2 sequential and 4 total applications.

11

Headline

(pyraclostrobin)

12 fl oz

72 fl oz

7

0.5

Do not exceed 2 sequential and 6 total applications of Headline or other Qol fungicides.

11

Headline SC

(pyraclostrobin)

12 fl oz

72 fl oz

7

0.5

Do not exceed 2 sequential and 6 total applications of Headline or other Qol fungicides.

11

Quadris

(azoxystrobin)

15.4 fl oz or 0.8 fl oz/1000 row ft

2.88 qt

7

4 hr

Do not exceed 2 sequential and 4 total applications of Quadris or other Qol fungicides. See label for soil applications.

11

Willowood Azoxy 2 SC

(azoxystrobin)

15.5 fl oz

62 fl oz

7

4 hr

Do not exceed 2 sequential applications.

11 & 3

Custodia

(azoxystrobin + tebuconazole)

12.9 fl oz

51.7 fl oz

21

0.5

See label for details.

11 & 3

Evito T

(fluoxastrobin + tebuconazole)

9 fl oz

36 fl oz

7

19

Do not exceed 2 sequential and 4 total applications.

11 & 3

Headline AMP

(pyraclostrobin + metconazole)

14.4 fl oz

57.6 fl oz

 

0.5

Do not exceed 2 sequential and 4 total applications of Headline AMP.

11 & 3

Quilt

(azoxystrobin + propiconazole)

14 fl oz

56 fl oz

14

0.5

Alternate every other application with a fungicide of dissimilar mode of action.

11 & 3

Quilt XCEL

(azoxystrobin + propiconazole)

14 fl oz

56 fl oz

14

0.5

Alternate every other application with a fungicide of dissimilar mode of action.

11 & 3

Avaris

(azoxystrobin + propiconazole)

14 fl oz

28 fl oz

14

0.5

See label for details.

11 & 3

Stratego 250 EC

(trifloxystrobin + propiconazole)

12 fl oz

24 fl oz

0

0.5

Do not apply more than 2 sequential applications.

11 & 3

Stratego YLD

(trifloxystrobin + propiconazole)

5 fl oz

20 fl oz

0

0.5

Do not apply more than 2 sequential applications.

11 & 7

Priaxor SC

(pyraclostrobin + fluxapyroxad)

8 fl oz

16 fl oz

7

0.5

See label for details.

Gray leaf spot

3

(tebuconazole)

Many brands available: Folicur 3.6F, Monsoon 3.6F, Orius 3.6F, Tebustar 3.6L, Tebuzol 3.6F, Toledo 3.6F

6 fl oz

24 fl oz

7

0.5

Restricted-entry time is 19 days.

3 & 33

Viathon

(tebuconazole + potass. phosphite)

3.0 pt

16.5 pt

7

0.5

See label for details and rotational restrictions.

7 & 11

Priaxor SC

(pyraclostrobin & fluxapyroxad)

8 fl oz

16 fl oz

7

0.5

Alternate with a fungicide of dissimilar mode of action.

3 & 7 & 11

Miravis Neo

(pydiflumetofen; azoxystrobin; propiconazole)

13.7 fl oz

44.5 fl oz

14

0.5

Do not make more than 2 sequential applications.

Eye spot

3

(propiconazole)

Many brands available: Amtide propiconizole 41.8, Bumper 41.8EC, Fitness, Propiconazole E-AG 41.8EC, Propimax EC, Tilt

4 fl oz

16 fl oz

14

0.5

Do not exceed 4 total applications.

7

Vertisan

(penthiopyrad)

24 fl oz

48 fl oz

7

0.5

Soil and foliar treatments. See label for details.

7 & 11

Priaxor SC

(pyraclostrobin & fluxapyroxad)

8 fl oz

16 fl oz

7

0.5

Alternate with fungicides of dissimilar modes of action.

3 & 7 & 11

Miravis Neo

(pydiflumetofen; azoxystrobin; propiconazole)

13.7 fl oz

44.5 fl oz

14

0.5

Do not make more than 2 sequential applications.

11

Aftershock

(fluoxastrobin)

0.24 fl oz per 1000 ft of row in soil, 3.8 fl oz foliarly

22.8 fl oz in-furrow or 7.6 fl oz foliarly

 

0.5

Soil and foliar treatments. See label for details.

11

Evito 480SC

(fluoxastrobin)

3.8 fl oz

15.2 fl oz

7

0.5

Do not exceed 2 sequential and 4 total applications.

11

Headline

(pyraclostrobin)

12 fl oz

72 fl oz

7

0.5

Do not exceed 2 sequential and 6 total applications of Headline or other Qol fungicides.

11

Headline SC

(pyraclostrobin)

12 fl oz

72 fl oz

7

0.5

Do not exceed 2 sequential and 6 total applications of Headline or other Qol fungicides.

11 & 3

Quadris

(azoxystrobin)

15.4 fl oz or 0.8 fl oz/1000 row ft

2.88 qt

7

4 hr

Do not exceed 1 sequential and 4 total applications of Quadris or other Qol fungicides. See label for soil applications.

11 & 3

Evito T

(fluoxastrobin + tebuconazole)

9 fl oz

36 fl oz

7

19

Do not exceed 2 sequential and 4 total applications.

11 & 3

Headline AMO

(pyraclostrobin + metconazole)

14.4 fl oz

57.6 fl oz

7

0.5

Do not exceed 2 sequential and 4 total applications of Headline AMP.

11 & 3

Helmstar Plus

(azoxystrobin + tebuconazole

10.8 fl oz

43.2 fl oz

7

19

Do not spray after V-8 growth stage.

11 & 3

Quilt

(azoxystrobin + propiconazole)

14 fl oz

56 fl oz

14

0.5

Alternate every other application with a fungicide of dissimilar mode of action.

11 & 3

Quilt XCEL

(azoxystrobin + propiconazole)

14 fl oz

56 fl oz

14

0.5

Alternate every other application with a fungicide of dissimilar mode of action.

11 & 3

Avaris

(azoxystrobin + propiconazole)

14 fl oz

28 fl oz

14

0.5

See label for details.

11 & 3

Stratego 250EC

(trifloxystrobin + propiconazole)

12 fl oz

24 fl oz

14

0.5

Do not apply more than 2 sequential applications.

11 & 3

Stratego YLD

(trifloxystrobin + propiconazole)

5 fl oz

20 fl oz

14

0.5

Do not apply more than 2 sequential applications.

11 & 7

Priaxor SC

(pyraclostrobin + fluxapyroxad)

8 fl oz

16 fl oz

7

0.5

See label for details.

Damping-off

M3

Defiant 75WP

(thiram)

5.3 oz/100 lb of seed

   

1

Seed treatment only.

M3

Signet 480FS

(thiram)

5.0 oz/100 lb of seed

   

1

Seed treatment only.

Damping-off seedling blight

3

Vortex

(ipconazole)

0.085 fl oz/ 100 lb of seed

   

0.5

Seed treatment only.

4 & 3

Dividend Extreme

(mefenoxam + difenoconazole)

5 fl oz/100 lb of seed

   

2

Seed treatment only.

11

Dynasty

(azoxystrobin)

0.153 fl oz/100 lb of seed

   

4

Seed treatment only.

11

Trilex

(trifloxystrobin)

0.96 fl oz/100 lb of seed

     

Seed treatment only.

Pythium seedling blight

Systemic downy mildew

4

(metalaxyl)

Various brands available: Acquire, Acceleron, Allegiance, Sebring 2.65ST

3 fl oz/100 lb seed

   

1

Seed treatment only.

4

Apron XL

(mefenoxam)

2.2 fl oz/100 lb

seed

   

2

Seed treatment only.

33

(mono- and dipotassium salts of phosphorous acid)

Various brands available: Confine Extra, K-phite

3 qt

 

0

4 hr

See label for details.

Soilborne diseases

11

Aftershock (fluoxastrobin)

0.24 fl oz per 1000 ft of row in soil, 3.8 fl oz foliarly

22.8 fl oz in-furrow or 7.6 fl oz foliarly

 

0.5

Soil and foliar treatments. See label for details.

Various seedling diseases

1

Thiabendazole 4L ST

0.41 fl oz/80,000 kernel

   

0.5

 

1, 4, 11, 12

Maxim Quattro

(thiabendazole, mefenoxam, azoxystrobin, and fludioxonil)

     

0.5

Seed treatment only.

3

Difenconazole 3L ST

(difenconazole)

1.25 fl oz/100 lb of seed

   

0.5

Seed treatment only.

3 & 4

EverGol Energy

(metalaxyl + prothioconazole)

2 fl oz/100 lb of seed

   

0.5

Seed treatment only.

4, 14, & NC

System 3

(mefenoxam + PCNB + Bacillus subtilis GB03)

3 oz/bu of seed

   

1

Seed treatment only.

7

Kernel Guard Supreme

(carboxin + permethrin)

     

0.5

Seed treatment only.

11

Stamina

(pyraclostrobin)

1.6 fl oz/100 lb of seed

     

Seed treatment only.

12

(fludioxonil)

Various brands available: Dyna-Shield, Maxim 4FS, Spirato 480 FS

0.16 fl oz/100 lb of seed

   

0.5

Seed treatment only.

14

Rizolex

(tolclofos-methyl)

0.3 fl oz/100 lb of seed

   

0.5

Seed treatment only.

1 FRAC code (fungicide group): Number (1 through 46) and letters (U and P) are used to distinguish the fungicide mode of action groups. All fungicides within the same group (with same number or letter) indicate the same active ingredient or similar mode of action. This information must be considered for the fungicide resistance management decisions. U = unknown, or a mode of action that has not been classified yet and is typically associated with another number; P = host plant defense inducers. Source: FRAC Code List 2019; http://www.frac.info/ (FRAC = Fungicide Resistance Action Committee).

2 Information provided in this table applies only to Florida. Be sure to read a current product label before applying any chemical. The use of brand names and any mention or listing of commercial products or services in the publication does not imply endorsement by UF/IFAS Extension nor discrimination against similar products or services not mentioned.

Table 7. 

Nonfumigant nematicides for sweet corn in Florida.

Product

Broadcast or Overall Rates

Row Rates

Per Acre

Per 1000 sq ft

Per Acre, 36" Row Spacing

Per 1000 ft of Row, Any Row Spacing

Counter 15G*

---

---

5.4–7.3 lb

6.0–8.0 oz

Mocap 15G**

40 lb

0.9 lb

10.8–14.8 lb

0.75–1.0 lb

*Apply banded or in the row not to exceed 8.7 lb/A.

**Do not allow Mocap to come in contract with seed. Apply as a 12 to 15 inch band treatment, incorporating Mocap product according to label instructions.

These products are not as consistently effective against root-knot nematodes as the fumigants but are registered as indicated.

Table 8. 

Fumigant nematicides for sweet corn in Florida.

Nematicide

Broadcast Application1

In-the-Row Applications

Gallons or lb per Acre

fl oz/1000 ft/chisel spaced 12" apart

Telone II2, 3

9 to 12 gal

26 to 35

For any row spacing, application rates given may be concentrated in the row but shall never exceed the labeled maximum for broadcast applications. Consult the product label for additional detail.

Telone C-172, 3

10.8 to 17.1 gal

31.8 to 50.2

For any row spacing, application rates given may be concentrated in the row but shall never exceed the labeled maximum for broadcast applications. Consult the product label for additional detail.

Telone C-352, 3

13 to 20.5 gal

38 to 60

For any row spacing, application rates given may be concentrated in the row but shall never exceed labeled maximum for broadcast applications. Consult the product label for additional detail.

Pic-Clor 60

19 to 31.5 gal

57 to 90

For any row spacing, application rates should never exceed the labeled maximum for broadcast applications. Consult the product label for additional detail.

Vapam HL

75 gal

-

For drip or in-row chisel fumigation, consult product label for proportionately reduced overall rates, drip concentration, and flow-modifying directions and procedures.

KPam HL

60 gal

-

For drip or in-row chisel fumigation, consult product label for proportionately reduced overall rates, drip concentration, and flow-modifying directions.

Allyl isothiocyanate

(AITC)

Dominus

40 gal

-

For drip or in-row fumigation and crop termination, consult product label for proportionately reduced overall rates, drip concentration, and flow-modifying directions

1 Gallons/acre and fl oz/1000 feet provided only for mineral soils. Higher rates may be possible for heavier- textured (loam, silt, clay) or highly organic soils.

2 All of the fumigants mentioned are for retail sale and use only by state certified applicators or persons under their direct supervision. New supplemental labeling for the Telone products must be in the hands of the user at the time of application. See new label details for additional use restrictions based on soil characteristics, buffer zones, Fumigant Management Plans (FMP), requirements for Personal Protective Equipment (PPE), mandatory good agricultural practices (GAP’s), product and applicator training certification, and other rate-modifying recommendations.

3 Higher application rates are possible in the presence of cyst-forming nematodes.

Rates are believed to be correct for products named and similar products of other brand names when applied to mineral soils. Higher rates are required for muck (organic) soils. However, the grower has the final responsibility to see that each product is used legally; read the label of the product to be sure that you are using it properly.

Footnotes

1.

This document is HS737, one of a series of the Horticultural Sciences Department, UF/IFAS Extension. Original publication date June 1995. Revised April 2020. This is Chapter 17 of the Vegetable Production Handbook of Florida, 2020–2021 edition. Visit the EDIS website at http://edis.ifas.ufl.edu.

2.

Ramdas Kanissery, assistant professor, UF/IFAS Southwest Florida Research and Education Cente; Eugene McAvoy, Extension agent IV, UF/IFAS Extension Hendry County, Labelle; Richard N. Raid, professor; Johan Desaeger, assistant professor, nematology, Entomology and Nematology Department, UF/IFAS Gulf Coast REC; and Julien Beuzelin, assistant professor, UF/IFAS Everglades REC; UF/IFAS Extension, Gainesville, FL 32611.

The use of trade names in this publication is solely for the purpose of providing specific information. UF/IFAS does not guarantee or warranty the products named, and references to them in this publication do not signify our approval to the exclusion of other products of suitable composition.


The Institute of Food and Agricultural Sciences (IFAS) is an Equal Opportunity Institution authorized to provide research, educational information and other services only to individuals and institutions that function with non-discrimination with respect to race, creed, color, religion, age, disability, sex, sexual orientation, marital status, national origin, political opinions or affiliations. For more information on obtaining other UF/IFAS Extension publications, contact your county's UF/IFAS Extension office.

U.S. Department of Agriculture, UF/IFAS Extension Service, University of Florida, IFAS, Florida A & M University Cooperative Extension Program, and Boards of County Commissioners Cooperating. Nick T. Place, dean for UF/IFAS Extension.