Preventative Fungicide Programs

trc · Oct 3, 2017

Any of the zoysia guys have experience with preventative fungicide programs? I had a few smallish brown patch spots last spring and want to take every precaution from dealing with that again if I can avoid it with a little time and money. :thumbup:

May have slightly overdone N last year (4lb/k) trying to amend P and K so started with good cultural pratices this year. No N until may and just under 3lb/k N total this year all milo except for a september synthetic app .5lb N of 7-10-10.

Per recommendations from Clemson (http://www.clemson.edu/extension/hgic/pests/plant_pests/lawns/hgic2150.html) I ordered Headway G (Azoxystrobin + Propiconazole) and Eagle 20EW (Myclobutanil) as both rate well for patch diseases and three active ingredients should mitigate impact of resistance.

With overnight lows just hitting 60 and below here in Atlanta I was planning to spread 3lb/k Headway G this weekend and them either another 3lb/k Headway or 1.2oz/k Eagle after 28 days.

Thoughts? :bandit:

Spammage · Oct 3, 2017

Eagle will burn the grass if temps are 85* or higher, and I didn't think it helped much with zoysia patch. My regimen now consists of Clorothalanil and Tebuconazole. The Tebuconazole twice in the Fall and twice in the Spring 28 days apart, with Clorothalanil about a week before the first app and twice in between the apps of Tebuconazole. Has worked great for me and is cheap. The Clorothalanil is great to have handy for spot treatment if something shows up. The downside is the product labeling, but I don't know how to read so good.

gatormac2112 · Oct 3, 2017

I don't have a fungus in my yard, is it still a good idea to apply Headway G and if so, just one application now and one in Spring?

gatormac2112 · Oct 3, 2017

Spammage said:
Eagle will burn the grass if temps are 85* or higher, and I didn't think it helped much with zoysia patch. My regimen now consists of Clorothalanil and Tebuconazole. The Tebuconazole twice in the Fall and twice in the Spring 28 days apart, with Clorothalanil about a week before the first app and twice in between the apps of Tebuconazole. Has worked great for me and is cheap. The Clorothalanil is great to have handy for spot treatment if something shows up. The downside is the product labeling, but I don't know how to read so good.

I didn't see this before posting. Would you recommend this for me? 2 preventive treatments this month and again in spring?

Spammage · Oct 3, 2017

gatormac2112 said:
I didn't see this before posting. Would you recommend this for me? 2 preventive treatments this month and again in spring?

A lot of that really depends on your area and the weather. Zoysia patch is primarily active at soil temps in the 60-72 range and worse if moist/wet. We have years in DFW where we go from Summer to Winter in a month or vice versa. Those years a single Tebuconazole app would be sufficient to cover that month.

gatormac2112 · Oct 3, 2017

Spammage said:
gatormac2112 said:

I didn't see this before posting. Would you recommend this for me? 2 preventive treatments this month and again in spring?

Click to expand...

A lot of that really depends on your area and the weather. Zoysia patch is primarily active at soil temps in the 60-72 range and worse if moist/wet. We have years in DFW where we go from Summer to Winter in a month or vice versa. Those years a single Tebuconazole app would be sufficient to cover that month.

So you treat every 14 days until soil temps are out of range?
EDIT: I just looked up the label. It seems I could apply once in fall and once in spring.

Spammage · Oct 3, 2017

Most fungicides will recommend a Fall app when soil temps reach 72-75 and another 28 days later if conditions will still accommodate fungal growth. One Spring app is probably sufficient, but the second is cheap insurance. The Clorothalanil is like a snack between meals when conditions are perfect for fungal growth, and it is recommended to use different products to avoid fungal resistance.

jayhawk · Oct 3, 2017

I'm all ears on the topic, as shaded areas were I've had in spring...2 years ago. I too, didn't do a traditional spring N app and didn't see it this year but I know "it's complicated". my exchange with Ken Mangum, he says "Torque (tebuconazole) is one of the best and cheapest fungicides. Prostar is also very good."
i do think, fall is more critical going into dormancy. Boy has growth rate slowed fast these last 2 weeks!

i am learning that some areas are at risk due to shade profiles in the fall. It's amazing how what used to get a lot of sun thru August sees much less now.

Are those two in different classes? Would love to have a portfolio of options, liquid ...open to splitting 😀

trc · Oct 4, 2017

Thanks Spamage, as usual ahead of the curve on zoysia research. Wish i had come across Tebuconazole earlier and will plan to get that in the rotation. For now will do two apps of Headway 28 days apart (1/2 bag each) and then look into a spray plan for spring.

Any thoughts if i can mix the Headway with sop, lime or another non-N carrier to help evenly distribute such a small payload (~3lb/k)? Used to milo and have never had to spread such small amounts before.

Spammage · Oct 4, 2017

trc said:
Any thoughts if i can mix the Headway with sop, lime or another non-N carrier to help evenly distribute such a small payload (~3lb/k)? Used to milo and have never had to spread such small amounts before.

I typically use Milo as a carrier. I don't know if there would be any issues with effectiveness when spreading with sop or lime as a carrier. I've never spread granular fungicide, but I would try to get as close to the same particle size for whatever carrier you choose. If it is a small prill, then play sand could also be a cheap option for a carrier.

J_nick · Oct 4, 2017

I meant to take a picture before I left the house but I forgot. Headway uses small granules I would say it's comparable in size to Milorganite.

trc · Oct 4, 2017

Would rather not put more N down if i can avoid it, but with cooler weather maybe not an issue. What do the bermuda or cool season guys do for an even spread of Urea? Spread rate is pretty similar.

jayhawk · Oct 9, 2017

I bought some Torque today. I hate to have a lifetime supply but one visit from a vendor is 80$.

gatormac2112 · Oct 9, 2017

Quali-Pro looks to be about 1/2 the price of Torque and has the same active ingredient, Tebuconazole 38.7%.

They both are the same thing right?

http://www.domyownpestcontrol.com/quali-pro-tebuconazole-36f-foliar-fungicide-p-13573.html

http://www.domyownpestcontrol.com/cleary-torque-turf-and-ornamental-fungicide-p-10296.html

jayhawk · Oct 9, 2017

Yes. I did buy generic, but couldn't remember how to spell the entire name so torque was easy

jayhawk · Oct 9, 2017

I guess I can spray my roses and everything else

pennstater2005 · Oct 9, 2017

Deleted.

trc · Oct 9, 2017

Follow up: spread half the headway g bag pretty evenly on a double pass via barely opening the spreader valve. In hindsight wayyy more expensive than spraying tebu. but supposed to be the best. We'll see....

gatormac2112 · Oct 10, 2017

jayhawk said:
Yes. I did buy generic, but couldn't remember how to spell the entire name so torque was easy

I wasn't questioning your shopping skill, I was just making sure I was buying the right thing :thumbup:

gatormac2112 · May 12, 2018

@Spammage

I just got around to buying Tebuconazole, but was also wanting to get the Chlorothalonil. Which product of chloro would you recommend?

I was going to go ahead and put down one app now, then follow up in fall. Is that OK?

Preventative Fungicide Programs

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