Brian from Hopwood, Pa writes
Quinclorac 75 DF is not labeled for orchardgrass. Depending on where you are treating, you can use Killzall Weed and Grass Killer – 41% Glyphosate. This product is a non-selective herbicide, so please be sure to carefully read the product label before purchase and application.
Answer last updated on: 03/19/2020