Primesource Quinclorac 1.5L Select Liquid Crabgrass Killer (64 ounces), White

just as listed

Works better than anything else that I have tried on Crabgrass! I mixed 4 Oz with 2 gallons of water, added two tables spoons of Dawn dish soap and spot sprayed with my 2-gallon hand sprayer. I could see each crabgrass plant, so I did not need any dye to see what I was spraying. 3 days later, crabgrass is dying, lawn grass is untouched and a week later the crabgrass plants rot! No need to pull them up or disturb the other grasses. I'm now crabgrass free!

If you are looking for a post emergent to kill Crabgrass this is the stuff. It may take 2 treatments but is will do the job. It is expensive but you get what you pay for and 1.5L of this will last a long time.

I sprayed my entire yard (about 1/2 acre) with a mix of Quinclorac and Methylated seed oil. Saw good signs of crabgrass and some broadleaf weeds dying off. After the first round it killed about 60% of the crabgrass and my lawn (fescue) was unaffected. I waited a few days and went back and spot treated areas I missed. About 50% of that died off. Overall I’d say it killed about 70% of my crabgrass. There were a couple viney weeds in yard and they just started to yellow about a week after spraying. This stuff is a bit of a pain to deal with because of the warnings about getting it on skin. I wore rubber gloves, long pants and long sleeve shirt. Not easy on a mid-90 degree muggy day. The methylated seed oil bottle was a pain and very hard to pour. I poured some of it into a cup and the. Scooped out the recommended amount with a teaspoon. Overall I would recommend this as it did kill most of the crabgrass and did not harm my fescue. Bumped it down a star for only killing 70%.

I used it according to the directions in the evening with the recommended Southern Ag Methylated Seed Oil (MSO) Surfactant and Liquid Harvest Lazer Blue - 8 Ounces - Concentrated Spray Pattern Indicator, Weed Dye, Herbicide Dye, Fertilizer Marking Dye, Turf Mark and Blue Herbicide Marker. The pics are day 4 and my grass is fine. My midwest acerage has always had a nice lawn but I slacked off for a couple seasons and a little crabgrass turned into a crazy amount this season. I had switched to a liquid applicator instead of broadcast and am finding it a lot more difficult than planned to get what i always just grabbed in bags before. I can see a few spots here and there that I missed so I'll touch them up in round 2 but the blue dye helped vusually to make sure I got 98% of it the first time. I was a little low on daylight and learned I had more crabgrass than I realized once I was I got going. I highly recommend not cheaping out to save a couple bucks on the Surfactant especially. Otherwise the spray will just fall off the leaves or ball up in big drops and roll off to the ground (surface tension) and you will not achieve a desired result.

Does not work. It's been a week and one day, and the crabgrass is as bright, and green, and strong, and growing as good as it always does in July. I think I hear the crab grass laughing at me, like "Ha! What else ya got buddy?!" I don't think there is ANY post emergent spray other than some gasoline and a match that will kill crabgrass this time of year. Would refund this, but, since I opened it up and used some, I don't want a "We are reviewing your return." drama with the seller. Oh well lesson learned. Fool me once.

This product works great to kill the water grass that comes up mid-summer. Plus kills other unwanted weeds in your lawn. And you don't have to mix a lot in a gallon.

11-9-19 Update- My 5 year old dog became ill three weeks after using this product. It’s been a roller coaster ride with his health. Found a lump this week, we suspect lymphoma. Lymphoma can be caused by herbicides. I’m not saying it’s the cause but I STRONGLY suspect this product is the culprit. Just be aware. Two days later and 95% of my crabgrass is brown. I picked a day with no rain in the forecast since you’re supposed to wait 24 hrs after application before watering the lawn. I applied and three hours later we got torrential downpours so i was sure I would see no results. Wrong! Day 1, I noticed discoloration, day two it was brown. My grass (ryegrass) was not affected.