Vegetable Weed Control Bulletin

2009 Weed Control Guide for Vegetable Crops
MSU Extension Bulletin E-433


Weed Problem	Chemical	Pounds Active Ingredient (AI)/Acre	Amount of Commercial Product/Acre	Remarks and Limitations Items in bold have changed since the printed bulletin.

Emerged weeds before planting	paraquat (GRAMOXONE MAX 3L)	0.49	1.3 pt	PREEMERGENCE: Apply before or after seeding but before lettuce emerges. Include 1 pt NIS/100 gal. RUP

Preemergence annuals	bensulide (PREFAR 4E)	5-6	5-6 qt	Apply preplant and incorporate or preemerge and water in. Not effective on muck soil.

	pronamide (KERB 50W)	1-2	2-4 lb	MINERAL SOIL: Apply before or after seeding but before weeds emerge. Incorporate or irrigate into the soil. Can be applied postemergence to lettuce. MUCK SOIL with >20% OM: Use 4-6 lb ai (8-12 lb of product) to improve weed control on muck soil. 55-day PHI. RUP. SLN label.

Postemergence broadleaves	carfentrazone (AIM 1.9EW)	0.031	2 fl oz	Apply between rows with a hooded sprayer. Apply to weeds up to 3 inches. Add an adjuvant and nitrogen source. Maximum 2 applications per crop. Controls most annual broadleaves.

Postemergence grasses	clethodim (SELECT MAX 0.97E)	0.068-0.12	9-16 fl oz	Include 0.25% NIS/acre. Maximum 64 fl oz/acre/year. 14-day PHI.

	sethoxydim (POAST 1.5E)	0.19-0.28	1-1.5 pt	Apply to actively growing grasses. Include 1 qt COC/acre. Maximum 3 pt/acre/year. Head lettuce: 30-day PHI; leaf lettuce: 15-day PHI.

Postemergence perennials	glyphosate (ROUNDUP 4L)	2-3	2-3 qt	Apply to emerged perennials before planting in the spring or after harvest in the fall.