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.

Preemergence	s-metolachlor (DUAL MAGNUM 7.6E)	0.32-0.96	0.33-1.0 pt	Apply to soil surface after planting. Do not incorporate. Use low rate on sandy soil. 50-day PHI. See: www.farmassist.com to obtain label.

Preemergence annuals, nutsedge	cycloate (RO-NEET 6E)	2-3	1.4-2.0 qt	Mineral soil only. Apply before planting and incorporate 2-3 inches immediately. 45 day PHI. SLN label.

Postemergence broadleaves	clopyralid (STINGER 3L)	0.063-0.125	2.7-5.3 fl oz	Apply to spinach in the 2-5 leaf stage. Kills composite weeds, legumes, nightshade. Maximum 2 applications and 8 fl oz/acre/year. 21-day PHI.

	phenmedipham (SPIN-AID 1.3E)	0.49-0.65	3-4 pt	Apply to spinach with 4-6 leaves when temperature is below 75F. Do not spray when dew is present. Apply in 11-22 gallon/acre. SpinAid may cause crop stunting. 40-day PHI.

Postemergence grasses	clethodim (SELECT MAX 0.97E)	0.068-0.12	9-16 fl oz	Apply to small grasses. Include 0.25% NIS/acre in spray mix. 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 total of 3 pt/acre/season. 15-day PHI.

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