Primesource Quinclorac 1.5 Select (Drive XLR8) Liquid Crabgrass Killer 7.5 Ounces with Yield Titan's Vector Blue Concentrated Spray Pattern Indicator and Non-Ionic Surfactant Combo Pack

The pictures were taken on the third day after application. You can see the crab grass is dying while leaving other grasses unharmed. I've seen people complain about it not working and that's because they are using it on mature crabgrass with well established roots. For best results spray it when it's less than 2-3 inches long. Once it reaches 5-6 inches, it's recommended that you wait until the next season.A couple of tips I've developed over the years:1. Spray when it's young (see above).2. Use a surfactant. The leaves are too waxy to hold onto the spray.3. Use multiple applications 1-2 weeks apart. If the roots are well established you will kill only part of them and the plant will recover. Multiple applications also gets any new sprouts since the last application.4. Use a spray dye so you can see how well you've covered the plant. All leaves need to be saturated. If you don't cover all leaves with herbicide the weed seems to recover. The dye also helps to see where you've sprayed. and where you haven't.

Worked on a southern Bermuda lawn like a charm....takes a couple of weeks but smokes crabgrass ...did not harm grass...will stun the crap out of Dallis grass...I combined it with Celsius

I purchased this as a remedy to eliminate bent grass and torpedo grass, I was told it would brown my St. Augustine and eliminate the others. It did the complete opposite, in fact the bent grass and other weeds seemed to thrive. A costly mistake in many ways.

Took about a week and the crab grass was gone.

Worked exactly like its supposed to and the dye was a big help

Followed the instructions to the letter and now almost 3 weeks later I've seen pretty much no difference. I had a handful (not an exaggeration) of weeds brown a bit, but 99% were unaffected. Given the price and its overall ineffectiveness, I will be reaching out to the manufacturer for a refund.Overall, I would not recommend this product.

Works great.

Bought this to kill crabgrass. Got eyestrain trying to read instructions. Used at recommended proportions and my crabgrass loved it. Grew more and faster and gave me a chorus of "Feed Me, Seymour" when I walked by. Should be labeled crabgrass super food.