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

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!

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.

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.

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%.

Killed TF out of all my crabgrass that took over my yard. Mixed with the recommended oil so it clings in to the crab grass blades and I don’t think a single crab grass weed survived my single one time application. I initially tried the hose mounted spectracide brand treatment and it did not work at all. This stuff however DOES work. Now that all the crabgrass is dead and brown as a paper bag, I have applied new grass seed now that it’s cool in the fall. And then the key next year will be to apply the crab grass preventer at the exact right soil temperature so that the crab grass seeds don’t germinate. I never applied a preventer before and have always been chasing after the fact. Learned the hard way but I’m glad to have found a product that does effectively kill any and all crabgrass

I’ve done a lot of research and reading review on this product before purchasing. There were many tutorials and videos that claim this product is godsend. The price was on the upper end but I thought I’d give it a try. I have 1 acre of property in Michigan and I sprayed during spring as per recommendations. I follow the instructions and load it into my tow behind sprayer. Fully covered front and back then patiently waited for 24 hrs, then 48 hrs, then 36 hrs…. Nothing happened!! All types of weeds remain, can’t even kill a dandelion for crying out loud. Don’t bother with this product, save your money! You’ll be glad you read this review.

I've used this product for a couple years and it works well. The last bottle I received was leaking through the saturated box.

A shocking WOW !!!! After reading the umpteen pages of instructions (which I always do) and applying this product to my late summer crabgrass attack (because I was away this spring and could not apply pre emergent), I thought I might have to wait a few weeks for any results. But lo and behold … within two days I saw yellowing on some of the attacking grasses. I couldn't be more surprised or happy. Yes it is an expensive product but it is clearly selective; my Bermuda is untouched but the nasty invaders are dying. So I will apply it again, per the instructions and as needed and will definitely buy it again. Thank goodness I found it and I cannot recommend it more.