Permethrin Dilution - Updated with Product PDFs

[casportpony]

Permethrin comes in three different concentrations, 10% (most common, sold in most feed stores), 13.3% (common), and 36.8% (usually has to be ordered online). Below are tables that show how to make 1 gallon.

36.8% Solution needed per gallon
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Ratio	Ounces	ML	Final %
1:19	1.7 ounces	50 ml	0.5%
1:39	0.85 ounces	25 ml	0.25%
1:99	0.34 ounces	10 ml	0.10%
1:199	0.17 ounces	5 ml	0.05%
1:399	0.085 ounces	2.5 ml	0.025%

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13.3% Solution needed per gallon
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Ratio	Ounces	ML	Final %
1:19	5.5 ounces	163 ml	0.5%
1:39	2.75 ounces	81 ml	0.25%
1:99	1.1 ounces	32.5 ml	0.10%
1:199	0.55 ounces	16.2 ml	0.05%
1:399	0.275 ounces	8.1 ml	0.025%

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10.0% Solution needed per gallon
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Ratio	Ounces	ML	Final %
1:19	6.4 ounces	190ml	0.5%
1:39	3.2 ounces	95 ml	0.25%
1:99	1.28 ounces	38 ml	0.10%
1:199	0.64 ounces	19 ml	0.05%
1:399	0.32 ounces	9.5 ml	0.025%

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[Kiki]

Are you going to make tables for the other starting percentages too?

 

[casportpony]

Are you going to make tables for the other starting percentages too?

yes, will do one for the 13.3% & the 10% too.

 

[Kiki]

yes, will do one for the 13.3% & the 10% too.

 

[casportpony]

Done, I think.

 

[cmom]

THANKS!!! I'm bookmarking it.

 

[jher77]

This is worthy of being an article.

Which dilution do you use to spray chickens for mites?

 

[cmom]

I have used them all and it depends on how heavy of infestation you have. This is for Permethrin 10.

 

[casportpony]

I have used them all and it depends on how heavy of infestation you have. This is for Permethrin 10.

Ratio	Ounces	ML	Final %
1:19	6.4 ounces	190ml	0.5%
1:39	3.2ounces	95 ml	0.25%
1:99	1.28 ounces	38 ml	0.10%
1:199	0.64 ounces	19	0.05%
1:399	0.32	9.5	0.025%

 

[cmom]

If you buy the premixed spray it is usually the (0.25%).