[Stuofsci02]

I think I must have massively overdosed the Tnex. What I have seems consistent with pgr overregulation.... yellowing and browning of the turf, damaged tips, some grass blueing wiphile other grass appears heat stressed.... I know I put down 37% more than I wanted, but I must have gone more than that and not realized.. I also did not mow when I applied which the label says can lead to some yellowing....

I am holding out hope that in a couple of weeks it will be back to normal...

 

[Rig2]

I way over applied my first PGR application. I went with .4 oz/1000. It destroyed my lawn a week later. Looked heat stressed, yellow, looked like tons of thatch and all around terrible. It took over a month to start growing more than like 1/8 inch week. Then the rebound happened. Within 3 days it grew over 3 inches and out grew the ugly grass. I can say that after the rebound and new growth the grass looked awesome.

 

[GoPre]

I way over applied my first PGR application. I went with .4 oz/1000. It destroyed my lawn a week later. Looked heat stressed, yellow, looked like tons of thatch and all around terrible. It took over a month to start growing more than like 1/8 inch week. Then the rebound happened. Within 3 days it grew over 3 inches and out grew the ugly grass. I can say that after the rebound and new growth the grass looked awesome.

Dang...I don't think that's a large dose at all?

 

[scooter422]

I run .75 per k and have never had that problem.

 

[Stuofsci02]

I way over applied my first PGR application. I went with .4 oz/1000. It destroyed my lawn a week later. Looked heat stressed, yellow, looked like tons of thatch and all around terrible. It took over a month to start growing more than like 1/8 inch week. Then the rebound happened. Within 3 days it grew over 3 inches and out grew the ugly grass. I can say that after the rebound and new growth the grass looked awesome.

Wow... that dose seems low.. I put down 0.4 oz on mine and my neighbors lawn at the end of May without issue. I thought I went 0.5 oz per k this last time, but I was at 0.7oz... Still I thought it should be fine but I don't know the issue... I did not cut prior to or right after and that is recommended to prevent yellowing..

I appreciate you input. It gives me hope that it will get better. I does seem to improve a little each day. I don't think it has really grown at all in the last 2 days. I have been cutting every three to 4 days..

 

[Stuofsci02]

Here is a closeup of the worst area from Sunday morning.. After reading papers on PGR uses on golf course greens this seems to be the signs of over application/regulation. Since I think this is cause I have changed the thread title so it is easier for others to find.

"Over-regulation of turf can resemble other types of stress and often is confused with disease. The turf has a blue-brown color and putting greens have a patchy appearance. On closer inspection, the leaves generally are free of lesions but have a worn appearance with brown, shredded leaf tips. Occasionally, leaves will have lesions from diseases like dollar spot or leaf spot."

 

[Rig2]

Yep. That picture looks exactly like my grass did on my over application. I was initially aiming for 3oz but got to talking with my neighbor while spraying and it threw off my pace and it got the .4oz. So Next time I applied at the rate of .3oz and the grass was slightly stressed. I have settled in at .25ozand that rate works the best with no stress signs but I have to apply more often. I have some weak grass (Scott's tttf mix, didn't know of this site at reno time).

 

[Stuofsci02]

Yep. That picture looks exactly like my grass did on my over application. I was initially aiming for 3oz but got to talking with my neighbor while spraying and it threw off my pace and it got the 4oz. So Next time I applied at the rate of 3oz and the grass was slightly stressed. I have settled in at 2.5 and that rate works the best with no stress signs but I have to apply more often. I have some weak grass (Scott's tttf mix, didn't know of this site at reno time).

Wait.. did you do 4oz or 0.4oz ?

 

[Scagfreedom48z+]

Here is a closeup of the worst area from Sunday morning.. After reading papers on PGR uses on golf course greens this seems to be the signs of over application/regulation. Since I think this is cause I have changed the thread title so it is easier for others to find.

"Over-regulation of turf can resemble other types of stress and often is confused with disease. The turf has a blue-brown color and putting greens have a patchy appearance. On closer inspection, the leaves generally are free of lesions but have a worn appearance with brown, shredded leaf tips. Occasionally, leaves will have lesions from diseases like dollar spot or leaf spot."

Hang in there. Mine looked similar to this. Once the tnex wore off and the grass rebounded, it came back great. I also applied, what I thought was a lower dose. I applied 0.5 with FEature and it made my grass look horrid. Took 3 weeks to grow out of it completely. Certain spots came back quicker. Gave my turf the patchy look, lush green spots and rest brownish/yello. My next app will be .25oz per 1M

 

[Stuofsci02]

Rig2/Scag,

Thanks for posting your experiences. Makes me feel a lot better about it coming back. Everyday I come home I am afraid to turn onto my street (hoping for the best, but expecting the worst).. Sounds like I need to be patient. It has now been 10 days since I put it down and probably 8 days since the PGR started working. Assuming 310 GDD (Celcius 0C base) I have gone through about 144 GDD so far so I have at least 160 GDD left. It is getting hotter this week so I should be able to accumulate that GDD in another 8-10 days. So maybe another week or so..

 

[Kmartel]

This thread is a disaster. Over application, yes that happens, everyone makes mistakes. But everything you did immediately following the realization of your mistake is crazy. You stressed the turf, that's the time to baby it. Instead you dropped mowing height and hit it with the dethatcher! Wtf!! Fortunately moisture and air temperatures were in your favor. Your looking to increase green tissue (more leaf surface area) to help recover and grow out. Monitor closely for disease as you can't afford any further set backs. Maybe some organic fert is in order. Baby it, help it recover by giving it everything it needs.

Good luck!

 

[Stuofsci02]

This thread is a disaster. Over application, yes that happens, everyone makes mistakes. But everything you did immediately following the realization of your mistake is crazy. You stressed the turf, that's the time to baby it. Instead you dropped mowing height and hit it with the dethatcher! Wtf!! Fortunately moisture and air temperatures were in your favor. Your looking to increase green tissue (more leaf surface area) to help recover and grow out. Monitor closely for disease as you can't afford any further set backs. Maybe some organic fert is in order. Baby it, help it recover by giving it everything it needs.

Good luck!

Ha... Yep.. And I mowed it again tonight too... Put down 0.25lb N/k of 16-16-16 last night.. Grass recovers, I am not too worried.. If it wants to live in my yard it is going to need to be strong . I don't baby...

Joking aside, it is looking a lot better. I predict it will be back to normal in a week or so based on the daily improvements..

 

[Stuofsci02]

Things are starting to come back pretty good. Now at 2" HOC... most of the yellow is dead seed stalks... i think the worst is we'll behind me..

 

[Stuofsci02]

It has been 3 long weeks and it is about 90% recovered... I'm back baby!

 

[JP900++]

Encouraging thread. I seem to struggle with the PGR apps as well. Last fall I yellowed it for weeks. This spring left for vacation and got inches of rain for days resulting in fungus. Now I'm seeing a little growth and we're moving into dry, with upper 90s and no irrigation system. Tough love I guess.

 

[Stuofsci02]

Encouraging thread. I seem to struggle with the PGR apps as well. Last fall I yellowed it for weeks. This spring left for vacation and got inches of rain for days resulting in fungus. Now I'm seeing a little growth and we're moving into dry, with upper 90s and no irrigation system. Tough love I guess.

Yeah I hear you... I got my first app right.. I need to be more careful in the future..

 

[JP900++]

Yeah. Yours is looking pretty darn good in the last shot.

 

[Scagfreedom48z+]

It has been 3 long weeks and it is about 90% recovered... I'm back baby!

Turf looks awesome man. It's an eye sore for sure but once the PGR wears off and gives
the grass a chance to pop again, it will come back to normal. Just takes a little patience. I also gave the turf a small shot in the arm and applied .25lbs per 1M of UREA to spoon feed it and it helped the cause.

 

[Stuofsci02]

Thanks Scagg,

I also put down 0.9lbs N/K of a 32-0-4 synthetic fert last week to help it along... So far I can't argue with the results... I am sure it will mean more water over the next couple of weeks, but so be it...