Welcome to the forum!

The Quinclorac should work on the crabgrass but may take multiple applications a couple of weeks apart. It could also ding your bermuda in the heat but the bermuda will recover. Be sure to follow the label and spray it evenly. Celsius is safe in the heat but will only work on young crabgrass before it gets to the third tiller. With crabgrass, the best offense is a good defense. I would be sure to start a pre-emergent program with something like Prodiamine. The best time for crabgrass is in late-winter/early spring but I'm of the mindset that it is never too late for pre-emergent. Don't kill off the entire yard. Bermuda recovers great; send some photos of what you are dealing with and we can offer more suggestions.

 

Thanks for the help, I will take a fee pictures. I detached the yard about a month ago but it was by hand using thatch rake (small yard ~1000sqft) and used a liquid aerator. As well as applied a basic 10-10-10 fertilizer. I did a soil test (home test not sent to lab) and Nitrogen showed pretty much nothing, phosphorus was ok and potassium was good to slight surplus. As I mentioned above I have already purchased quiniclorac 1.5l, a non ionic surfactant and a marker dye. However I've not applied it yet as it just came and we've have a lot of rain forecasted for this week. Thank you.

 

I still see a lot of Bermuda in there. I'd give the quinclorac a go once the weather cooperates and see how it looks in a few weeks.

 

Ok thank you I will do that. It was very rough looking when we moved in. I think there was a lot of annual rye that had died off. How often can I fertilize to get the nitrogen levels up to where they should be. Also I've read pgf complete is good fertilizer as well as their super juice though it's kinda pricey. Is there anything similar that is a bit cheaper? Thanks for all the help, I noticed you are in Panama City, that's my girlfriend's hometown.

 

+1 for don't nuke the yard.

If you're willing to work on it for the season, you can definitely get it under control and back in good shape. Quinclorac per label instructions on the existing plants. Re-apply as instructed to hit them a couple times.

Pre-emergent (prodiamine is my weapon of choice) in the transition from winter/spring will then keep them from coming up with such vengeance next spring. Then you're spot-treating a MUCH smaller group of crabgrass plants next year. Keep this on your annual rotation and you'll be good in no time.

As far as fertilizer this time of year, I'd put down a slow release 3-1-2 (15-5-10 or something like that) ratio with a little iron (2%-3%) in it if you can find it locally. My only caution is to stay away from a 'weed and feed' that comes with other ingredients. I like to keep my fertilizer and weed apps separate and intentional.

 

+1 for don't nuke the yard.

If you're willing to work on it for the season, you can definitely get it under control and back in good shape. Quinclorac per label instructions on the existing plants. Re-apply as instructed to hit them a couple times.

Pre-emergent (prodiamine is my weapon of choice) in the transition from winter/spring will then keep them from coming up with such vengeance next spring. Then you're spot-treating a MUCH smaller group of crabgrass plants next year. Keep this on your annual rotation and you'll be good in no time.

As far as fertilizer this time of year, I'd put down a slow release 3-1-2 (15-5-10 or something like that) ratio with a little iron (2%-3%) in it if you can find it locally. My only caution is to stay away from a 'weed and feed' that comes with other ingredients. I like to keep my fertilizer and weed apps separate and intentional.

Since there is so much crabgrass should I apply the quinclorac to the entire lawn or should I just try and hit only the crabgrass?

 

On the Quinclorac, do I understand the temperature thing correctly? It says not to apply above 85F. So is that literal? If it is at 75F a 6AM I can apply even if afternoon temperatures get to 95F? Or is it don't apply if temp will exceed 85F at some point during the day?

I understand the bermuda will survive. Shoot I just glypho'd a patch that was 90% crabgrass and not only did the bermuda survive, it looked happier. It was like thank you sir, may I have another helping?

 

My understanding is that the temperature limitation is related to the actual time of application.

Hopefully, someone more knowledgeable will come along and clarify for us whether the 95F daytime highs are an issue because of the actual heat or due to the potential drought stress from the high temps. I have some areas I am considering spot spraying with Drive XLR8 in an irrigated Zoysia yard, but this is later in the season than I've ever used Quinclorac, so I am curious as well.

Quote from DoMyOwn 👇

 

Mow, wait two days, blanket spray quinclorac and a low rate of prodiamine (0.2 oz/m), wait 2 days and irrigate in.

 

With that much crabgrass pressure I would definitely broadcast spray that quinclorac. Make sure you have a good calibrated sprayer and some MSO (ideally, vs the NIS). Wait to spray until the day after you mow, if possible. If you have irrigation you can mitigate turf damage by making sure it's properly hydrated before & after application. And don't spray in the middle of the hot day, wait for evenings or early mornings for these apps.

As for nitrogen amounts.. I would advise you go with a quick-release nitrogen source, since you're trying to push your bermuda to grow & fill in. Irrigation is key though so stay on top of that, & you can apply 1#N monthly without issues. Hopefully by the end of this growing season (not sure where you're located, for me in Atlanta that tends to be Septmeber) you'll see exactly how much good turf you have to work with. Put the turf to bed with a Potassium fertilizer and some winter pre-emergent around that time and get ready for a turn-around year next year. Bermuda is resilient like that.

 

I'm located in Nashville, TN. I was able to mow yesterday and I sprayed the quinclorac 1.5l this morning over the entire yard. We have no rain predicted for the next 2-3 days then some should move in. Hopefully this gives it enough time to act on the crabgrass. The label said the water after 48-72 hours so hopefully it works out perfectly. I do not have an irrigation system but my front yard is just shy of a thousand square feet. My backyard however is much much larger so irrigation system is in the plans for the future but that's a whole nother topic when it comes to dealing with the backyard.
One other question what is the best type of sand for leveling the yard?
Thanks for all the help.

 

Thanks for all the help I've received from the forum members. I just wanted to post an update. The quinclorac did not seem to do much of anything I could have possibly not used enough surfactant I don't know. I followed up by spraying celsius and quiniclorac mixed together with a methylated seed oil surfactant. I am finally able to see results. The Bermuda looks very healthy and progress is becoming noticeably yellow hopefully this does the trick I will follow up with another application and two or three weeks. Next year I will definitely be using a pre-emergent so I hopefully don't have these problems I've included some pictures. The Bermuda seems to be coming in well and is really thickening up. Again thanks for all the help.

 

I was in your same boat, lots of crabgrass in my front lawn (1000 sq ft) I applied Quinclorac 1.5l and a MSO according to their directions, I didn't mow for 3 days prior to application with at least 24 hrs of rainfree predicted following the application. then I let it sit for 3 to 5 days before mowing and leaving the clippings on the lawn according to directions. I started seeing results in a couple of days, about 70% of the crabgrass terminated, I have now sprayed 3 times and should be pretty much having the crabgrass controlled. Follow the directions on the bottle and you should be fine, but be patient. it's timing the rain that is driving me crazy.

 

Nice! What did you use to spray? A good battery-powered backpack and a good spray tip (many use teejet nozzles) is a very good tool for applying pre-emergents, post-emergents, and even fertilizer. There are many on here that spray everything and do not use granular. It's cheaper and it's more convenient as you can apply multiple products in 1 tank and do it all in one pass on the yard.

 

Hello all, I know this is an older post, I created it. This is my lawn now after usingbpre emergent this spring. I have been applying nitrogen at a rate of .25lb per week(applied by sprayer). I'm really trying to push the Bermuda to spread and fill in the bare spots. I believe the yard is common bermuda as the home was built in 1937. I only have a rotary mower as of now because I still need to work on leveling the yard. HOC is 1.5" I might try to move down to 1" but I feel like it would be hard on the grass because of the way a rotary mower cuts as apposed to a reel. Thanks for all your help.