2024-2025 Quick Reference Guide to Postemergence Herbicides for Citrus Weed Control

Ramdas Kanissery, Camille E. McAvoy, Jamie D. Burrow, Stephen H. Futch, Brent A. Sellers, and S. Shea Teems

Products recommended in the Florida Citrus Production Guide and their effects on weed management. This publication is best viewed as a PDF.

Table 1.

	Herbicide^a	MOA^b	REI^c Hours	PHI^d Day(s)	Weeds Controlled		Comments	Suggested Rate per Acre
	Herbicide^a	MOA^b	REI^c Hours	PHI^d Day(s)	Grasses	Broadleaf	Comments	Suggested Rate per Acre
Nonselective Systemic Herbicides	Glyphosate—Undertree	G (9)	Varies^e	1	X	X	Avoid contact with citrus fruit, foliage, and green bark. Rainfall within 1–6 hours after application may reduce effectiveness.	Annual weeds: 0.75–1.5 lb A.E^.f Perennial weeds: 1.5–3.75 lb A.E. See product label for annual maximum rate.
	Glyphosate—Chemical mowing	G (9)	Varies	1	X	X	Do NOT mow within 1 week before or after treatment.	Bahiagrass: 0.125 lb A.E. followed by 2nd application 45 days later Bermudagrass: 0.125–0.37 lb A.E.
	Glyphosate—Wiping	G (9)	Varies	1	X	X	Use wipers to remove tall growing and difficult weeds.	5%–10% solution—carpet wiper 50%–100% solution—panel wiper
	Glyphosate—Spot treatment	G (9)	Varies	1	X	X	Avoid contact with citrus fruit, foliage, and green bark.	1%–2% solution
	Glyphosate plus 2,4-D—Landmaster II	G, O (9, 4)	48	7	X	X	Apply with shielded and hooded sprayers in citrus middles or under the trees. User must have supplemental labeling at time of application. See label for min. distance from susceptible crops, record-keeping requirements, and additional restrictions. Rainfall or irrigation within 4 hours may reduce effectiveness. Heavy rainfall or irrigation within 2 hours will wash product off foliage, requiring repeat treatment.	Use recommended rate in 10–40 GPA Annual weeds: 1–8 qt Perennial weeds: 4–8 qt Maximum of 8 qt/year
								Rate per application	Maximum rate/year	Max. # appl./yr	Min. time btwn. appl.
Nonselective Contact Herbicides	Carefentrazone- ethyl AimEC	E (14)	12	3	X	X	Adjuvant is required such as nonionic surfactant or crop oil concentrate. Avoid contact with green tissue or fruit. Finished spray volume of at least 20 GPA required.	Max 2.0 fl oz	7.9 fl oz		14 days
	Glufosinate-ammonium Rely 280	H (10)	12	14	X	X	Warm temperatures, high humidity, and bright sunlight improve performance. Avoid contact or spray drift with green bark, stems, or foliage. Spot treatment: 1.7 fl oz per gallon of water. Apply to undesirable vegetation foliage until wet but prior to runoff.	48–82 fl oz	246 fl oz (4.5 lb a.i.)		14 days
	Paraquat Gramoxone SL 2.0	D (22)	24	-	X	X	Addition of surfactant or crop oil concentrate is essential for maximum contact activity. Avoid contact with citrus fruit, foliage, and green bark. Per new labeling requirement, applicators must complete mandatory training program and be certified applicators of restricted-use pesticides.	2.5–4.0 pt	20 pt
Selective Systemic Herbicides	Fluazifop Fusilade DX 2 E	A (1)	12	14	X		Do not apply to grasses under stressed conditions. For spot treatment use 1% v/v solution with 1% crop oil concentrate or 0.25% nonionic surfactant in 30–40 GPA.	24 fl oz	72 fl oz		21 days
	Mesotrione Broadworks 4 L	F2 (27)	12	1		X	Allow at least 12 weeks between applications at 6 fl oz/A and at least 6 weeks between applications of 6 fl oz/A and subsequent applications of 3 fl oz/A. Use of a crop oil at 1% v/v or nonionic surfactant at 0.25% is recommended. Addition of ammonium sulfate is suggested.	Max 6 fl oz at 1st appl.	12 fl oz		6 weeks
	Sethoxydim Poast Plus 1.0 EC	A (1)	12	15	X		Repeated applications at 3–4 week intervals may be required to control some species. Carrier volume should not exceed 20 GPA. Spot treatment use 1.5%–2.25% v/v solution of Poast Plus w/1% crop oil concentrate.	2.25–3.75 pt	15 pt
	Saflufenacil Treevix	E (14)	12	-		X	4Use methylated seed oil and ammonium sulfate to optimize burndown activity. Avoid contact with citrus fruit, foliage, flowers, buds, and green bark. Increased efficacy at water volumes of 20 to 40 GPA. *Additional Dormant Period Application: May be applied sequentially up to 4 times per year only if 1 or 2 applications occur from postharvest to the beginning of bloom.	Max 1.0 oz	3.0 oz (4.0 oz*)	3 (4*)	21 days
	2,4-D Embed Extra	O (4)	48	7		X	Controls annual and perennial broadleaf weeds. Apply when weeds are in their early and active growth stages, and limit application to groves established for at least one year. Only apply when there is no risk of spray drift. Avoid contact with tree trunks and foliage.	Max 4.0 pt	n/a	2 at max rate	75 days
Always read individual product labels for complete directions for use, restrictions and limitations, and tank-mix and additive recommendations.
^a All listed pesticides are registered and trademarked products. ^bMode of action class (MOA) for citrus pesticides from the Herbicide Resistance Action Committee (HRAC). Weed Science Society of America (WSSA) classification is provided in the parentheses. ^c Restricted Entry Interval ^dPreharvest Interval ^e REIs vary from 4–12 hours depending upon glyphosate formulation chosen. Check the individual product label to confirm REI. ^fAcid Equivalence—conversion factors on reverse

Table 2.

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