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Herbicide used to kill nutsedge can damage other plants

By Darrell Blackwelder
For the Salisbury Post
A few weeks ago, there was information about an observational study of nutsedge control in liriope at the Agricultural Center on Old Concord Road in Salisbury using Sedgehammer (halosulfuron-methyl). It is a selective herbicide used to control nutsedge, generally sold in one gallon packets.
The herbicide does a good job controlling nutsedge in turf, but it is not an over-the- top spray for ornamentals. It can be used to spot treat in shrub and flower beds. The herbicide did a very good job of controlling the nutsedge in the study.
Unfortunately, the liriope was severely damaged and in some places killed outright. The jury is still out if the herbicide should be labeled for over-the-top of liriope. Weed scientists warn that if you do use this herbicide on liriope, follow the directions carefully and apply under ideal, stress free conditions.
Bottom line: This is a selective herbicide that will control nutsedge, but be careful when applying in liriope, especially in areas under stress.
Use only as a spot treatment in shrub and flower beds.

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