Are you willing to do off label? I'd go 3X azoxystrobin at the 28 day rate. Add the propi if you want for dollar spot, I don't. That's all labeled. The off label is to rotate chlorothalonil at a 14 day rate.

 

@tgreen, are you suggesting 2.3 oz./1,000 Azoxy every 28 days?

 

Not sure what the poster above means by '3x azoxy' but if you read the label it will tell you how many apps you should limit it to before switching to a different Group Type fungicide. Usually what I see is no more that 2 consecutive applications with a single Group Type Fungicide before adding another Group Type to the mix OR switching to another Group Type fungicide entirely.

 

@tgreen, are you suggesting 2.3 oz./1,000 Azoxy every 28 days?

No, sorry. I meant you can go 3 applications of azoxystrobin at the 28 day rate before rotating. 28 days + 28 +28, or 84 days before rotating. Label says you can only do 2 times if treating for pythium (but I wouldn't use azoxy on pythium).

 

@tgreen, are you suggesting 2.3 oz./1,000 Azoxy every 28 days?

No, sorry. I meant you can go 3 applications of azoxystrobin at the 28 day rate before rotating. 28 days + 28 +28, or 84 days before rotating. Label says you can only do 2 times if treating for pythium (but I wouldn't use azoxy on pythium).

Thanks for clarifying.

 

@tgreen, are you suggesting 2.3 oz./1,000 Azoxy every 28 days?

No, sorry. I meant you can go 3 applications of azoxystrobin at the 28 day rate before rotating. 28 days + 28 +28, or 84 days before rotating. Label says you can only do 2 times if treating for pythium (but I wouldn't use azoxy on pythium).

Not sure what the poster above means by '3x azoxy' but if you read the label it will tell you how many apps you should limit it to before switching to a different Group Type fungicide. Usually what I see is no more that 2 consecutive applications with a single Group Type Fungicide before adding another Group Type to the mix OR switching to another Group Type fungicide entirely.

right i get the no more than 2 consecutive application. presumably this is per season. so do you appply prop again next season and only apply twice so keep doing that w/out have to worry about resistance?

 

….i dont understand. … i dont get it. …

We were all there at one time and quite frankly I would estimate the majority of us are still learning. I know I still am …

^That^ said and I can't stress this enough and I am assuming you have not already …

Read. This. Thread. (!): The TLF Fungicide Guide (Cool Season Focus): https://thelawnforum.com/viewtopic.php?f=9&t=4042

….how many application is too much to cause resistance …?

Personally, I APPLY NO MORE THAN TWO Applications OF ANY SAME FUNGICIDE *or* ANY FUNGICIDES FROM THE SAME FRAC (see the above linked thread for an explanation of why knowing the basics of what the FRAC's are is so critical to success)

 

right i get the no more than 2 consecutive application. presumably this is per season. so do you appply prop again next season and only apply twice so keep doing that w/out have to worry about resistance?

Hopefully my below post from another thread will help you - in specific spades! :thumbup:

Again, so there's no confusion (I sense you get it :thumbup: ) I am careful to NEVER USE THE SAME FRAC category more than twice in a row - I am intensely fastidious about this.

I have also found that products containing "oxystrobin" give the lawn a real "boost" in overall vigor growth and color. So much so that I will typically time my application of the WONDERFUL product "Armada" for the weeks / month that the lawn is the most stressed. Even in the doggest days of summer, neighbors and visitors never fail to comment on the lawns appearance starting days and lasting weeks after I apply Armada!

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Here is my 100% successful rotation schedule for last 2 or 3 years, depending upon how early in the Spring things heat and humidity up I typically strive to get my first app down WELL AHEAD of those "surprise nights" when overnight temps and humidity % add up to the magical number of "150" for fungal outbreak!!!

(ON MY PARTICULAR HILLSIDE, alls it takes is as few as one or two nights when overnight temps might be in the 70's and humidity in the 80's and boy oh boy you better hope you've had your preventative app down at a minimum a couple days before or else, "Bam!" I once was in REACTionary mode! :shock: )

The asterisked notes are my own, from the year-to-year journal I keep (and live by! :lol: )

App "A-1": Myclobutanil - aka 'Eagle' (Group 3)

21 days later, App "A-2" Myclobutanil - aka 'Eagle' (Group 3)

21 days later App "B-1" (Choose your product containing) - azoxystrobin (Group 11)**

14-21 days later App "B-2" (Whatever product you chose containing) - azoxystrobin (Group 11)**

14-21 days later App "C-1" TM 4.5 - thiophanate-methyl (Group 1)

21 days later App "C-2" TM 4.5 - thiophanate-methyl (Group 1)

21 days later App "D-1" "Armada" - Triadimefon 41.67% Trifloxystrobin 8.33% (Groups 3 & 11 Combined)***

21 days later App "D-2" "Armada" - Triadimefon 41.67% Trifloxystrobin 8.33% (Groups 3 & 11 Combined)***

21 days later App "E-1" TM 4.5 - thiophanate-methyl (Group 1)

14-21 days later App "E-2" TM 4.5 - thiophanate-methyl (Group 1)

14-21 days later App "F-1" (Choose your product containing) - azoxystrobin (Group 11)**

21 days later App "F-2" (Whatever product you chose containing) - azoxystrobin (Group 11)**

21 days later, App "G-1" Myclobutanil - aka 'Eagle' (Group 3)

14-21 days later, App "G-2" Myclobutanil - aka 'Eagle' (Group 3)

** = some green up / pep up from "-oxystrobin" content!
***= Significant green up / pep up from "-oxystrobin" content!!!

- Mefenoxam (Group 4) in case Pythium blight rears it's ugly head (+/or at new seed down)

 

Hopefully my below post from another thread will help you - in specific spades! 👍

Again, so there's no confusion (I sense you get it 👍 ) I am careful to NEVER USE THE SAME FRAC category more than twice in a row - I am intensely fastidious about this.

I have also found that products containing "oxystrobin" give the lawn a real "boost" in overall vigor growth and color. So much so that I will typically time my application of the WONDERFUL product "Armada" for the weeks / month that the lawn is the most stressed. Even in the doggest days of summer, neighbors and visitors never fail to comment on the lawns appearance starting days and lasting weeks after I apply Armada!

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Here is my 100% successful rotation schedule for last 2 or 3 years, depending upon how early in the Spring things heat and humidity up I typically strive to get my first app down WELL AHEAD of those "surprise nights" when overnight temps and humidity % add up to the magical number of "150" for fungal outbreak!!!

(ON MY PARTICULAR HILLSIDE, alls it takes is as few as one or two nights when overnight temps might be in the 70's and humidity in the 80's and boy oh boy you better hope you've had your preventative app down at a minimum a couple days before or else, "Bam!" I once was in REACTionary mode! :shock: )

The asterisked notes are my own, from the year-to-year journal I keep (and live by! :lol: )

App "A-1": Myclobutanil - aka 'Eagle' (Group 3)

21 days later, App "A-2" Myclobutanil - aka 'Eagle' (Group 3)

21 days later App "B-1" (Choose your product containing) - azoxystrobin (Group 11)**

14-21 days later App "B-2" (Whatever product you chose containing) - azoxystrobin (Group 11)**

14-21 days later App "C-1" TM 4.5 - thiophanate-methyl (Group 1)

21 days later App "C-2" TM 4.5 - thiophanate-methyl (Group 1)

21 days later App "D-1" "Armada" - Triadimefon 41.67% Trifloxystrobin 8.33% (Groups 3 & 11 Combined)***

21 days later App "D-2" "Armada" - Triadimefon 41.67% Trifloxystrobin 8.33% (Groups 3 & 11 Combined)***

21 days later App "E-1" TM 4.5 - thiophanate-methyl (Group 1)

14-21 days later App "E-2" TM 4.5 - thiophanate-methyl (Group 1)

14-21 days later App "F-1" (Choose your product containing) - azoxystrobin (Group 11)**

21 days later App "F-2" (Whatever product you chose containing) - azoxystrobin (Group 11)**

21 days later, App "G-1" Myclobutanil - aka 'Eagle' (Group 3)

14-21 days later, App "G-2" Myclobutanil - aka 'Eagle' (Group 3)

** = some green up / pep up from "-oxystrobin" content!
***= Significant green up / pep up from "-oxystrobin" content!!!

- Mefenoxam (Group 4) in case Pythium blight rears it's ugly head (+/or at new seed down)

Since I had my lawn really messed up 2022 which was pythium . I have been a fungi worry wart. I was planning on a preventive cycle beginning in july as it came mid/late july last year.
My issues started mid may 2023 and so far I have done one cycle of eagle 20 and on Azoxy cycle now.
Its been a suppressive attempt and so far doing ok.
Planning on what to do next

 

@440mag... Just copy/paste this info into my lawn app notes. I've been looking for a good fungicide program and I'll try yours next spring! Thanks

 

@440mag... Just copy/paste this info into my lawn app notes. I've been looking for a good fungicide program and I'll try yours next spring! Thanks

ALL credit goes to the author(s) of the TLF Fungicide Guide (Focus on Cool Season)!!!!!! :clapping: :beer: :banana:

 

@440mag - quite an extensive program. Appreciate your sharing the detail.

If I may ask, what are the primary diseases you are fighting? As an example here in Central Virginia on the border of the outer piedmont and upper coastal plains, the dog days of summer bring primarily brown patch and potentially gray leaf spot; bookended in a distant third in spring and fall by, maybe, dollar spot.

Second, are you using a PGR and if so are you adjusting for the DMI/FRAC Group 3 fungicides?

Thanks again for sharing not only what you are using but when. It's been helpful dialing in a new plan.

 

Brown patch # 1 yes but also gray leaf spot, dollar spot and rust. And starting now always the threat of Pythium blight. And I'm undoubtedly leaving something out as the program has been so successful I haven't had any outbreaks (back in 2014-17 it was like a Wild West gunfight from June through October :-(

Plus I'm unable to concentrate as we have 19 lakehouse guests arriving tonight and the wife is shooting me those looks about enjoying a cup of coffee with this tablet in my lap, haha!

It's like a sauna out there as I type this (screenshot of indoor / outdoor) and has been raining for the last 16 hours so I'm sure my POA-, err turf-stand would look like the surface of Mars out there were it not for @Suburban Jungle Life doing all mankind the huge solid he did in creating the Fungicide Guide: https://thelawnforum.com/viewtopic.php?f=9&t=4042

I honestly DO NOT KNOW where I, my yard, my marriage, my property value or even my time and bank accounts would be were it not for the TLF Fungicide Guide!!!!!

No PGR here since like 2019 … I probably oughta get back into it but, I've made an effort to start trying to spend more time shooting and fishing and hiking etc.

Took the grandson up Old NC 105 as he's just got his learners permit and nothing like off road to teach new drivers to coordinate hands feet eyes accelerator brakes etc and it occurred to me it's insane to live this close to such beauty and not get up into the mountains and enjoy it more …!

 

Anyone used enclave? Fairly expensive but 3 groups in one. Maybe 4. Only problem I see if finding enough partners to rotate with. Anyone use Chipco/Iprodione. Looks like an easy way for me to add a group that claims very good Brown Patch results. I already use groups 1,3 7, and 11. Put down Xzemplar yesterday 15 days after Azoxy and Propazinole. Just Azoxy before that and Clearys Substitute before that. before that. Just looking for more Brown patch alternatives to have a three group rotation with all three having multiple Frac's within.. Affordably...

 

Thanks @440mag. LOL, don't get in trouble with your wife on my account!

Toss in canoeing and we're kindred spirits.

Also agree @Suburban Jungle Life has hero status for his work on the Cool Season Fungicide guide. Still helpful to see how others have "put it all together" though.

Dropping the FRAC Group 3's has been a challenge, but every year gets a little better as more is learned.

 

Took the grandson up Old NC 105 as he's just got his learners permit and nothing like off road to teach new drivers to coordinate hands feet eyes accelerator brakes etc and it occurred to me it's insane to live this close to such beauty and not get up into the mountains and enjoy it more …!

I've cycled a 50mi loop on this road. What stunning scenery.

 

Anyone used enclave?

I use Azoxy and rotate with Enclave. Been doing that for 3 years. Has worked great. I go azoxy at 28 day rate for 2X then Enclave at 14 day rate then back to Azoxy. I had gray leaf spot a few years ago so try to time an Enclave app for late August.

 

a year later, would you still recommend enclave for GLS pressure on (summertime) TTTF ?

 

@tgreen, are you suggesting 2.3 oz./1,000 Azoxy every 28 days?

No, sorry. I meant you can go 3 applications of azoxystrobin at the 28 day rate before rotating. 28 days + 28 +28, or 84 days before rotating. Label says you can only do 2 times if treating for pythium (but I wouldn't use azoxy on pythium).

Not sure what the poster above means by '3x azoxy' but if you read the label it will tell you how many apps you should limit it to before switching to a different Group Type fungicide. Usually what I see is no more that 2 consecutive applications with a single Group Type Fungicide before adding another Group Type to the mix OR switching to another Group Type fungicide entirely.

right i get the no more than 2 consecutive application. presumably this is per season. so do you appply prop again next season and only apply twice so keep doing that w/out have to worry about resistance?

so the total annual application limit is separate from the 2 consecutive application limit, the label will specify how much total active ingredient can be applied in a single year. The 2 consecutive limit resets once you apply a different Group Type fungicide.

 

I am thinking about doing that. Just add Xzemplar with the Azoxy. But I would really like to have a rotation of the groups. Seems Suburban Jungle and Do your own bothy recommend it.

 

I cycle per application using groups 1, 3, 4, and 11 at the appropriate application rates. All at 14-day intervals except for azoxy which is 28 days. I've combined apps to get additional coverage to prevent Pythium blight. But because I use 4 groups it is usually a single group app once then on to another. That way, I always have propi and azoxy available to cure an outbreak. But I'm still learning.

 

@440mag In looking at your program and number of days between each app, that's over 7 months. I must be reading that wrong.

 

So no one else uses Xzemplar, group 7 ? Iprodione, group 2?

 

@440mag In looking at your program and number of days between each app, that's over 7 months. I must be reading that wrong.

You're not reading it wrong, I simply did not include my journal which would provide the missing context:

Some years I can not only start start late (this year but especially last year both March and the entirety of April was not only low / no humidity and cool, Cool, COOL big time to the point we burned firewood up to May! ) and as a result skip the weeks of Armada altogether but, also finish early. All depends upon conditions … :thumbup:

But, if the "magic 150" of overnight temps PLUS humidity or other conditions lead to favorable disease conditions in March then yes, 7 months IS correct as I learned the HARD way some of the worst fungal outbreak conditions in my locale can be Sept/Oct, depending upon tropical storm paths and duration. :roll: I typically do not start, scratch that, dare not start my nitrogen blitz until November…

In another couple weeks or so I actually begin my annual watching of the west coast of the African continent for embryos of potentially named storms … :roll:

 

…
I've cycled a 50mi loop on this road. What stunning scenery.

Whoa! That's a heckuva lot o' legwork!!!!!!

 

@440mag In looking at your program and number of days between each app, that's over 7 months. I must be reading that wrong.

You're not reading it wrong, I simply did not include my journal which would provide the missing context

Gotcha, thanks for the clarification. Would be great if there was a service to sign up for that provided text/email alerts for weather conditions that are favorable for different lawn fungus.

 

In another couple weeks or so I actually begin my annual watching of the west coast of the African continent for embryos of potentially named storms … :roll:

I understand this watch. But I view this as a good thing.