Mariska from West Chester, Pa writes
My lawn company accidentally applied quinclorac to the part of our lawn that is dedicated to our free ranging chickens. Now I am afraid to let them out. Is there anything I can do to make that lawn safe for them again? How long do I need to wait?
When using Drive XLR8 Herbicide Crabgrass Killer the active ingredient quinclorac has dissipation values that can range from 60 to over 500 days. Because quinclorac does not bind well to soil, some dissipation noted in field testing could be due to chemical testing. The persistence hazard of qunclorac is rated high (likely to take over 60 days to degrade to half of the applied concentration). We would recommend waiting an entire season before any grazing took place on the area that was treated for this reason.
Answer last updated on: 08/29/2016
