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Publication #SS-AGR-235

Weed Management in Clover1

J. A. Ferrell and B. A. Sellers2

Tables

Table 1. 

Weed Management in Clover.

Trade Name and Rate of Commercial Product Per Acre

Common Name and Rate in Pounds of Active Ingredient Per Acre

Remarks

Preplant Incorporated

Eptam

3.5 pt

EPTC

For winter annual grass and some broadleaf weed control, incorporate 2 to 3 inches deep before planting. Do not use on white Dutch clover. Do not use if a grass or grain crop is to be planted with the clover.

Balan 60DF

2 lb

benefin

May be used on alsike, ladino, and red clover. For winter annual grass and some broadleaf weed control, incorporate 2 to 3 inches deep before planting. Do not use if a grass or grain crop is to be planted with the clover.

Postemergence—Seedling Clovers

Kerb 50W

1 to 1.5 lb

pronamide

For preemergence control of winter annual weeds, spray prior to weed emergence in November or December. Do not graze or cut for hay for 120 days after treatment. In fall-seeded clovers, applications should be made after clover has reached the first trifoliate leaf stage. In spring seedings, applications should be delayed until the following fall or early winter.

Poast

1 to 2.5 pt

sethoxydim

Apply with crop oil concentrate at 2.0 pts./acre to control annual and perennial grasses. Use the high rate for johnsongrass and bermudagrass. Do not apply to grasses growing under drought-stressed conditions. Apply to annual grasses less than 8 inches tall. Do not apply Poast within 7 days of feeding, grazing, or harvesting undried forage, or within 14 days of cutting for dry hay.

Pursuit 70DG

1.08 to 2.16 fl oz

imazethapyr

Apply to seedling clover with a minimum of two trifoliate leaves and when weeds are 1 to 3 inches tall or before rosette forming weeds exceed 3 inches in diameter. Pursuit requires a 1 hour rainfree period. Pursuit may cause a temporary reduction in height or slight leaf yellowing. DO NOT feed, graze, or harvest for 30 days after application. A maximum total of 2.16 oz./A of Pursuit may be applied per year. Add a nonionic surfactant at 0.25% v/v or a crop oil concentrate at 1.25% v/v to the spray solution. If replanting is necessary in a field treated with Pursuit, do not plant for 4 months following the application of Pursuit. Do not apply more than 1.44 ozs. during the last year of the stand.

Raptor

4.0 to 6.0 fl oz

imazamox

Apply to seedling clover with a minimum of two trifoliate leaves and when weeds are 1 to 3 inches tall. Raptor requires a 1 hour rainfree period. A temporary growth reduction may occur after application. DO NOT feed, graze, or harvest for 20 days after application. A maximum total of 6.0 fl. ozs./acre may be applied per season. Add a nonionic surfactant at 0.25% v/v or a crop oil concentrate at 1.0 to 2.0% v/v to the spray solution. If replanting is necessary in a field treated with Raptor, do not plant for 4 months following the application of Raptor.

Postemergence—Established Clover

Poast

1 to 2.5 pt

sethoxydim

Apply with crop oil concentrate at 2.0 pts./acre to control annual and perennial grasses. Use the high rate for johnsongrass and bermudagrass. Do not apply to grasses growing under drought-stressed conditions. Apply to annual grasses less than 8 inches tall. Do not apply Poast within 7 days of feeding, grazing, or harvesting undried forage, or within 14 days of cutting for dry hay.

Kerb 50W

1 to 1.5 lb

pronamide

Controls winter annual grasses and some broadleaf weeds in clovers, birdsfoot trefoil and crown vetch. Apply from November through February. DO NOT graze or harvest for hay for 120 days after application. KERB is a restricted use herbicide.

Pursuit 70DG

1.08 to 2.16 fl ozs

imazethapyr

Apply to established clover in the fall, or in the spring to dormant or semi-dormant alfalfa. Spring treatments should be made before excessive clover growth (less than 3 inches of new growth) to reduce spray interference. Apply when weeds are 1 to 3 inches tall or before rosette forming weeds exceed 3 inches in diameter. DO NOT feed, graze, or harvest alfalfa for 30 days after application. A maximum total of 2.16 oz./A of Pursuit may be applied per year. Add a nonionic surfactant at 0.25% v/v or a crop oil concentrate at 1.25% v/v to the spray solution. If replanting is necessary in a field treated with Pursuit, do not plant for 4 months following the application of Pursuit. Do not apply more than 1.44 ozs. during the last year of the stand.

Raptor

4.0 to 6.0 fl ozs

imazamox

Apply to established clover in the fall, or in the spring to dormant or semi-dormant alfalfa. Spring treatments should be made before excessive clover growth (less than 3 inches of new growth) to reduce spray interference. Apply when weeds are 1 to 3 inches tall or before rosette forming weeds exceed 3 inches in diameter. Raptor requires a 1 hour rainfree period. A temporary growth reduction may occur after application. DO NOT feed, graze, or harvest for 20 days after application. A maximum total of 6.0 fl. ozs./acre may be applied per season. Add a nonionic surfactant at 0.25% v/v or a crop oil concentrate at 1.0 to 2.0% v/v to the spray solution. If replanting is necessary in a field treated with Raptor, do not plant for 4 months following the application of Raptor.

Table 2. 

Estimated effectiveness of recommended herbicides on common weeds in Florida Clover.

Time of Application

PPI

PPI

PRE

POT

POT

Balan

EPTC - Eptam

Kerb

Poast or Select

Pursuit or Raptor

bahiagrass

P

P

P

F

bermuda grass

P

P

P

F–G

P

bitter sneezeweed

P

P

P

P

blackberry

P

P

P

P

bracken fern

P

P

P

P

briars (Smilax)

P

P

P

P

broomsedge

P

P

P

P

bulrush

P

P

P

P

buttercup

P

P

P

P

chickweed

F

E

G

P

E

crabgrass

E

G

F

G–E

F

cudweed

P

P

P

P

curly dock

P

P

P

P

F

dallisgrass

P

P

P

P

dandelion

P

G

P

P

dodder

P

P

E

P

dogfennel

P

P

P

P

evening primrose

F

F–G

P

P

foxtails

G

G

P

E

G

gallberry

P

P

P

P

goldenrod

P

P

P

P

henbit

F

G

P

P

E

honeysuckle

P

P

P

P

horsenettle

P

P

P

P

horseweed

P

P

P

P

Italian ryegrass

G

E

G

E

P

johnson grass

P

P

P

G

P

kudzu

P

P

P

P

little barley

G

G

E

F

mayweed

P

P

nettle, stinging

P

P

P

P

nutsedge

P

F

P

P

F

palmetto

P

P

P

P

perilla mint

P

P

P

persimmon

P

P

P

P

pigweed species

G

G

P

G

pokeberry

P

P

P

P

prickly pear

P

P

P

P

ragweed

P

P

P

P

F

red sorrel

P

P

P

P

sandbur

E

G

P

G

shepherds- purse

P

G

G

P

E

sicklepod

P

F

P

P

smutgrass

P

P

P

P

swinecress

P

G

F

P

Texas panicum

G–E

G

P

E

thistles

P

E

P

P

P

tropical soda apple

P

P

P

P

vaseygrass

P

P

P

P

Virginia pepperweed

P

G

P

P

wax myrtle

P

P

P

P

wild cherry

P

P

P

P

wild garlic

P

P

P

P

wild radish

P

P–F

P

P

G-E

wild plum

P

P

P

P

wild rose

P

P

P

P

wooly croton

P

P

P

P

P

Estimated effectiveness based on rates recommended in this report. Effectiveness may vary depending on factors such as herbicide rate, size of weeds, time of application, soil type, and weather conditions.

Weed Control Symbols: E = 90–100% control; G = 80–90% control; F = 60–80% control; P = less than 60% control; – = insufficient observations.

Time of Application Symbols: PPI = preplant incorporated; PRE = preemergence; POT = postemergence over the top.

Footnotes

1.

This document is SS-AGR-235, one of a series of the Agronomy Department, UF/IFAS Extension. Original publication date November 2005. Revised October 2008 and March 2014. Reviewed April 2017. Visit the EDIS website at http://edis.ifas.ufl.edu.

2.

J. A. Ferrell, associate professor, Agronomy Department; and B. A. Sellers, associate professor, Agronomy Department, UF/IFAS Range Cattle Research and Education Center; 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 does not signify our approval to the exclusion of other products of suitable composition. Use herbicides safely. Read and follow directions on the manufacturer's label.


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.