Mixing Certainty - Help/check

Kentucky bluegrass, Fescue, Rye and Bent, etc
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PSU4ME
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Mixing Certainty - Help/check

Post by PSU4ME » June 14th, 2019, 11:58 am

Can someone check my math here?

I'm treating Triv, it starts today. Certainty label says .25 ounce per acre.

I'm mixing up one gallon for spot treatments. Box came with a big (.8g) and sall (.16g) spoon

One ounce is 28.35 grams. .25 ounce is 7.08 grams.

7.08 grams divided by 43 (as i'm trying to see the mixture for 1 gallon over 1k sqft) is .164 grams.

So agree that i use the small, .16g spoon, per gallon?

Seems easy i just want some reassurance!

TimmyG
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Re: Mixing Certainty - Help/check

Post by TimmyG » June 14th, 2019, 1:16 pm

Rather than go through all that math and erroneously use the equivalence of a liquid ounce, just refer to the handy Measuring Scoop Instructions table in section 6.2 Mixing for Hand-Held Sprayers on the second page of the (old) label. There, it equates each small scoop to 0.25 oz/acre when applied over 1000 sq ft. The instruction do also recommend mixing that with 2 gallons of water, but that's up to you.

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PSU4ME
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Re: Mixing Certainty - Help/check

Post by PSU4ME » June 14th, 2019, 1:25 pm

Thanks Timmy, I did overlook that.

When doing spot spraying, I never know how much really to apply so the two or one gallon mix is a wash for me. It says not to water till run off so I just wet the grass. I’ll be watching it to see how it goes.

I can see why this is a multi year thing..... you’ll never get it all in one year.

Green
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Re: Mixing Certainty - Help/check

Post by Green » June 14th, 2019, 4:09 pm

TimmyG wrote:
June 14th, 2019, 1:16 pm
Rather than go through all that math and erroneously use the equivalence of a liquid ounce...

Wait...

Based on the above from TimmyG,

Why not just use a digital scale calibrated in ounces/grams the next time, PSU?

I have one and it's super inexpensive but can measure fractions of a gram. I weigh out all my dissolvables that way, and plan to do the same with Certainty this Spring/Summer.

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PSU4ME
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Re: Mixing Certainty - Help/check

Post by PSU4ME » June 14th, 2019, 4:13 pm

Green wrote:
June 14th, 2019, 4:09 pm
TimmyG wrote:
June 14th, 2019, 1:16 pm
Rather than go through all that math and erroneously use the equivalence of a liquid ounce...

Wait...

Based on the above from TimmyG,

Why not just use a digital scale calibrated in ounces/grams the next time, PSU?

I have one and it's super inexpensive but can measure fractions of a gram. I weigh out all my dissolvables that way, and plan to do the same with Certainty this Spring/Summer.

The small scoop is pretty easy :)

application down, here we go!


KBGkicksazz
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Re: Mixing Certainty - Help/check

Post by KBGkicksazz » June 14th, 2019, 4:52 pm

Why not just get tracker and do the whole yard?
PSU4ME wrote:
June 14th, 2019, 1:25 pm
Thanks Timmy, I did overlook that.

When doing spot spraying, I never know how much really to apply so the two or one gallon mix is a wash for me. It says not to water till run off so I just wet the grass. I’ll be watching it to see how it goes.

I can see why this is a multi year thing..... you’ll never get it all in one year.

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andy10917
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Re: Mixing Certainty - Help/check

Post by andy10917 » June 14th, 2019, 6:34 pm

Maybe he read the manufacturer's instructions which said:
Colorants or marking dyes may be added to spray solutions of this product;however, they can reduce product performance.

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PSU4ME
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Re: Mixing Certainty - Help/check

Post by PSU4ME » June 15th, 2019, 9:25 am

Yeah I don’t want to spray the whole lawn, the triv isn’t everywhere, just a few patches. The spray hurts the kbg temporarily so no need to cause damage to everything.

Plus the Tenacity lit up the triv so I knew where to spray and when I spray the second time I’ll see the stunted grass/growth - it will mark itself!

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Re: Mixing Certainty - Help/check

Post by Green » June 15th, 2019, 3:00 pm

Count yourself lucky you don't have to spray everywhere. I have Triv mixed in everywhere in some cases, and have to spray Certainty or Velocity over a combined 6-7 K and am hoping most of my good grass makes it through. I can only use Certainty on the areas that don't have TTTF, or where I don't mind having to reseed later. My strategy was glyphosate the defined patches, and use the selective stuff on the mixed areas. So far so good, but challenging.

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