Abound azoxystrobin fungicide?

[STL]

So, I was looking into fungicides and came across Abound, which contains azoxystrobin. The usual recommendations are heritage and strobe but I haven't seen Abound mentioned here.

I did a nice break down of the two labels and cost, but my original post wasn't 'approved.' Don't have the time right now to do that again, so I just summed it up below.

1 gallon of Abound has 22.9% azoxystrobin and contains 2.08 lbs AI. The 16 oz 50% strobe contains 0.5 lbs AI. To match the 0.2 AI rate of heritage/strobe you need 0.88 floz/K of Abound. That gives, if my math is correct, a bottle of Abound around 3x more applications for basically the same cost, ~$225.

https://www.keystonepestsolutions.com/i ... Akh88P8HAQ

http://www.syngenta-us.com/current-labe ... d-flowable. This label doesn't mention turf but the EPA label below does.

https://www3.epa.gov/pesticides/chem_se ... 040330.pdf

Seems like Abound is a much better deal for azoxystrobin or am I missing something?

[andy10917]

I did a nice break down of the two labels and cost, but my original post wasn't 'approved.'

STL:

I wasn't the person that didn't approve your posting, but I remember a discussion of the reason - some of your links were actually Google search strings. The results of a Google search string can change over time, become invalid, etc. An explanation of the reason was sent to your email, but in this recreated posting, you did the search string practice again. I fixed it, although I'm not supposed to do so. In the future, please don't include search strings as links - if folks want to Google, they know how to do so.

[turf_toes]

The original post wasn't approved because it contained a link to a 404 page, as was explained in the rejection.

[STL]

OK. No worries guys. Sorry for the broken/wrong links. Won't do that again. They seem work fine on my phone and was the only way I could copy it. Thanks for all you do keeping this site secure. I'm sure that's a lot of work.

[Leifcat1]

Wow....I'm glad I found this post! I've been buying Heritage DF 50% Azoxystrobin. I tank mix azoxystrobin and propiconazole once or twice a month as a preventative. The combination has served me well. For about the same price as two bottles of Heritage DF, a single bottle of Abound will give me over 14 applications compared to the four applications I would get with Heritage DF. Just ordered my Abound last night. Thank you, STL for posting!

[STL]

Yeah, no problem! All things being equal, seems like a no brainer.

[Leifcat1]

Look what just showed up...just in time for my monthly preventative treatment.

[seiyafan]

Do azoxystrobin products like Abound and Heritage need to be watered in or are they absorbed through leaves?

[STL]

It can be absorbed by the plants' roots and leaves. Watering in depends on what you're targeting and how much water you apply it with. Azoxystrobin is systemic and will translocate through the plant. It'll only move up and not down though. If you're targeting a root-based fungus, you'll need to water it in to the root zone, but not past it. It will also protect the leaves since it can move up.

[seiyafan]

Thanks, because I was reading the label but didn't find anything related to adding a surfactant or water it in afterwards. Another question, is Abound the most economical azoxystrobin available?

[Leifcat1]

In my opinion, yes.

[STL]

From my research, yes... by far. Note that abound isn't currently labeled for turf. You'll have to consult an older label for instructions or do a conversion to get your application rate since it has a different AI percentage than heritage and strobe.

[seiyafan]

Should I switch to Propiconazole after 2 applications of Azoxystrobin?

[Leifcat1]

I tank mix them together and apply at the same time. Each product works using a different mode of action so fungicide resistance is minimized. Syngenta sells their own combination of Azoxystrobin and Propiconazole (sold as Headway) but it is prohibitively expensive selling at $400+ per gallon. I haven't done the math yet, but i assume that my own generic tank-mix saves me a considerable amount of money in the long run.

[seiyafan]

Do you reduce the rate by half if you mix them 50-50?

[Leifcat1]

I apply each product at the minimum label rate. (The Azoxystrobin label doesn't specifically mention turf so I'm using STL's conversion rate listed above) I'm applying the Azoxystrobin at .88oz/k and propiconazole at 1oz/k.

[STL]

Should I switch to Propiconazole after 2 applications of Azoxystrobin?

You can do 2-3 applications of azoystrobin before you need to rotate. Download the heritage df label and read the turf and resistance management sections. That'll give you the guidelines.

[STL]

I apply each product at the minimum label rate. (The Azoxystrobin label doesn't specifically mention turf so I'm using STL's conversion rate listed above) I'm applying the Azoxystrobin at .88oz/k and propiconazole at 1oz/k.

0.88 of is actually the high rate for Abound. I should have been more clear. Sorry about that.

On the bright side, the bottle will last even longer now that you can apply at a lower rate!

Here's the conversion based off of the Heritage df application rate. Since the percentage of azoxystrobin is different for Abound and Heritage, we want to find the amount of Abound that gives the same amount of active ingredient as Heritage.

Heritage high rate is 0.4 oz of product x 50% azoxystrobin = 0.20 AI
Abound high rate is 0.88 oz of product x 22.9% azoxystrobin = 0.20 AI

Heritage low rate is 0.2 oz of product x 50% azoystrobin = 0.10 AI
Abound low rate is 0.44 oz of product x 22.9% azoxystrobin = 0.10 AI

[Billy]

When comparing ai rates, make sure you're comparing apples to apples. Percentages are only used for calculating ai rates for dry products, like Heritage (a WDG formulation). But, for liquid products (Abound and Heritage TL), the pounds ai per gallon conversion on the label is how ai rates are calculated.

Ai rates are also commonly expressed in pounds of ai/M for fungicides, so 0.4 oz/M of Heritage = 0.0125# ai/M. Since Abound is a liquid product, we need to use the liquid to dry conversion of 2.08# ai/gal from the label to determine the amount of Abound to use. To apply 0.0125# azoxystrobin per M using Abound, you would need to apply it at 0.77 fl oz/M.

Thus, 0.4 oz (dry ounces) Heritage/M = 0.77 fl oz (fluid ounces) Abound/M.

[Billy]

** Edit **

That last line should read "0.4 oz", not "4 oz". Typo. My bad.