You Are Here: Management Updates 2009 Archive May 12, 2009

Date: May 12, 2009
Category: Weeds
Subject: Crabgrass, Broadleaf Weeds, Winter Annuals

Preemergence herbicide applications for crabgrass and annual grassy weed control should be completed by now. Any remaining preemergence applications should be with dithiopyr products and preferably those that are a sprayable formulation. Start to monitor for germination of crabgrasss.

It is getting to the point in the season where we can think about treating broadleaf weeds if you have determined that they are a problem in the turf you are managing. It would be better, however, if you hold off a little longer.

Treating winter annual weeds now should only be considered if you think that their removal will significantly increase the establishment of fall-seeded turf areas, otherwise let them die on their own.

Tree seedlings in turf will mow out, an herbicide application is not needed.

For an update on weeds in landscape plantings, see UMass Extension's Landscape Message

Submitted by: Randall Prostak

DISCLAIMER - As always, it is the responsibility of the applicator to verify the registration status of any pesticide BEFORE applying it. Different states have different regulations as well. The author and the University of Massachusetts are not liable for any consequences of any pesticide "recommendations". Mention of any trade name is not to be considered endorsement of a product.

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