If it's not too many of them you can spot spray. I use spectracide weed killer concentrate with quinclorac

 

When do U typically get your first frost? U may not need to kill the crabby.

Use the Quinclorac. Be careful with amount of MSO as Quinclorac will do a number on FF.

 

@Stuofsci02 I had the same issue and decided to stick with same product. In my case double Quin hit.
They work in a different way (nonecreating overgrow, the other leading to chlorosis) and I was afraid the 1st app will cancel/decrease the effect of the other product.
M

 

If it's not too many of them you can spot spray. I use spectracide weed killer concentrate with quinclorac

Yeah it is about 13,000 sqft, so spot spraying is out of the question. I find the spectricide does not really have enough Quinclorac to kill the crabgrass..

 

When do U typically get your first frost? U may not need to kill the crabby.

Use the Quinclorac. Be careful with amount of MSO as Quinclorac will do a number on FF.

I have had a sudden surge of baby crabgrass pop up in my last years reno... it is pretty even spread popping up in all the smaller thin gaps in the lawn. I assume these are left over seeds from the old lawn that started germinating when it got hot in July..

2 weeks ago I spot sprayed tenacity on the worst areas and now most of the crab grass in that area is turning white. It is clear however that to get it all I will need a 2nd application and I will need to blanket spray...

The question is, I also have Drive XLR8 and MSO which I could use. Has anyone used both products together say a week apart to more quickly take out the problem? I want to avoid hurting the good turf, and I have seen vids of Quinclorac taking out everything...

Thanks

First frost is usually early OCT.... I don't want to let it go that long... want to smoke this stuff out..

Cheers

 

@Stuofsci02 I had the same issue and decided to stick with same product. In my case double Quin hit.
They work in a different way (nonecreating overgrow, the other leading to chlorosis) and I was afraid the 1st app will cancel/decrease the effect of the other product.
M

Yeah I will stick with the tenacity for now. Maybe some Quinclorac in August to get the stragglers

 

How long once you spray the crabgrass does it take to kill it with tenacity? I sprayed a bunch on the 3rd and am planning round two on the 17th (2 weeks)

 

@bosox_5 It takes long, very long. 4 weeks in my experience to 80% kill. 2 weeks apart 2nd app is a good idea. But do a split (5oz/acre).

 

As long as it is dying when the overseeded areas are coming up, I'm good with that

 

I plan on mixing Drive XLR8 and Mesotrione SC in my backpack sprayer this weekend.

I have 75% Tall Fescue & 25% is creeping red , chewings fine fescue , KBG