[Ral1121]

So I got a product from tractor supply labeled for Bermuda grass to kill crabgrass since my celcius app did not work. It was a mix of 2,4-d, quinclorac, and dicamba. I applied it through a bottle that hooks up to a hose. This was 2 days ago and now my yard is torched. Is this normal for this product? How long will it take my yard to recover? Thinking about also just scalping and resetting the height. Would that be a good idea or cause too much stress on the yard. Thinking if my yard already looks bad, might as well scalp to lower my cutting height.
Before 2 days ago



After spraying 2 days ago

 

[Ware]

Looks like San Antonio saw 102°F yesterday. Way too hot to be spraying that stuff.

 

[Tellycoleman]

Bummer right before the 4th of july

 

[Greendoc]

2,4-D on low cut Bermuda in those temperatures is harsh. Supposedly, hybrid Bermuda is also marginally tolerant of Quinclorac as well. That looks like about what happens when I use Dismiss at this time of the year. Grass should grow back and be green in a couple of weeks after you scalp off the singed grass.

 

[Ral1121]

I thought I could get away by doing it right before it got dark. It was around 80 when I sprayed it. I guess I learned my lesson.

@Greendoc
Is there anything I can spray in these temps to get control of crabgrass and not torch the yard?

 

[Greendoc]

I use Revolver+Celsius, but that is an expensive tank mix. 80 when you sprayed, but how hot did it get the next day? It gets into the low to mid 70s after 5 here, but I can really torch a lawn if it goes above 80 the next day. Sometimes I think I am more of a meteorologist than a turf manager. It is not easy getting my customers to think about more than what they want to see that fits into the program of what they want. I need to point out wind, rain, and occasionally excessive heat.

 

[rhanna]

Are you sure it's crabgrass and not something else? I sprayed some areas in my lawn with Celsius in the spring and then a mix of quinclorac and 2-4D a couple of weeks ago and some weeds are barely fazed. So I think maybe it's dallisgrass. I'm tempted to use a method that I saw by Jason Creel where he took a small handful of straight nitrogen and dropped it in the center of the weed.

The quinclorac/2-4D mix really hurt my lawn where I spot sprayed and it still hasn't recovered and I sprayed when the temps were under 85 for a few days. I think maybe I just over applied.

 

[Ral1121]

@Greendoc
It gets into the mid 70's over night and will get up to 100 during the day. I thought I was safe as long as when I actually applied it was not too hot. I guess not.

@rhanna

Im pretty sure it was crabgrass. Celcius kind of stunted it but it came right back. It is already yellowing and browning now after my recent app of what I put down a couple days ago. So I believe I got rid of my crabgrass but at the expense of the rest of the yard.

 

[Greendoc]

Here's why I say I play meteorologist. I have to think about temperature and potential for rainfall 7 days beyond when an application was made. The people that think they are getting around a temperature restriction by doing the application at 5 AM when the temperature was 79.999 degrees only to have it go up 85 or higher that day should have slept in and forgotten about it. If it goes up that high the next day or higher, still no good as you and I know.

 

[Movingshrub]

I'm tempted to use a method that I saw by Jason Creel where he took a small handful of straight nitrogen and dropped it in the center of the weed.

That's an interesting approach. Sounds a lot cheaper than a chemical application, quicker to apply, no tank to clean out, and, it's rainfast!

 

[Movingshrub]

Here's why I say I play meteorologist. I have to think about temperature and potential for rainfall 7 days beyond when an application was made. The people that think they are getting around a temperature restriction by doing the application at 5 AM when the temperature was 79.999 degrees only to have it go up 85 or higher that day should have slept in and forgotten about it. If it goes up that high the next day or higher, still no good as you and I know.

How long does it need to be below the temp limit? One day? Two days? One week? Does the answer change if it rains?

Do you apply at lower rates instead?

 

[Greendoc]

A week. In the rare instance that it is also raining, that does not matter. The combination of high humidity with heat that rain brings will torch grass. There are some herbicides I avoid using when the weather has switched from mostly cold and cloudy to warm. Lower rates are not it because that runs the risk of creating resistant weeds. If I cannot use a product at effective rates under the given conditions it is not used at all.

 

[rhanna]

I'm tempted to use a method that I saw by Jason Creel where he took a small handful of straight nitrogen and dropped it in the center of the weed.

That's an interesting approach. Sounds a lot cheaper than a chemical application, quicker to apply, no tank to clean out, and, it's rainfast!

Easier if you only have a few spots but obviously not quicker if you had 100 spots to hand spread. Probably not a strategy you want on some of the lawns on this forum that are near perfect.
My only worry would be if I don't kill the weed from fertilizer burn, what kind of weed will I be left with when it comes back stronger.

 

[Greendoc]

Tried that approach. No good and for the time it takes and results I get, not worth it. In my earlier years, I torched lawns with liquid fertilizer mixing up overly concentrated mixes. Weeds handled it better than the grass on top of that.

 

[Movingshrub]

@rhanna and @Greendoc Thanks for the prompt answer.

 

[CenlaLowell]

So this means no one should apply Celsius over 85 degrees correct? @Greendoc
Also if this is the case what are the best herbcides for summer applications?

 

[Ware]

So this means no one should apply Celsius over 85 degrees correct?

I spray Celsius on my bermuda when temps are over 85°F.

 

[Ral1121]

I tried Celsius and it did not work on the crabgrass. It gets rid of a lot of other things without burning up the yard in the summer though. That is the only reason I went to something else.

 

[Movingshrub]

So this means no one should apply Celsius over 85 degrees correct? Greendoc
Also if this is the case what are the best herbcides for summer applications?

No. 2,4-d product labels generally say not to apply in high temps. The OP applied 2,4-d three way in hot weather and caused damaged.

Celsius can be applied in hot temps; Hotter the better.

 

[Movingshrub]

Forgot to add. Quinclorac isn't always so friendly to hybrid bermuda. And, no offense to the OP, sounds like he may have over applied by using a hose end sprayer. All of those factors combined add up to some unhappy Bermuda grass.