Permethrin Dilution - Updated with Product PDFs

[Al Capon]

Fixing to mix up some permethrin, looking at the charts...

Should these two parts of the 13% & 10% charts be switched.?

 

[cmom]

Personally I use the 0.5% solution for best results.

 

[jher77]

Fixing to mix up some permethrin, looking at the charts...

Should these two parts of the 13% & 10% charts be switched.?

Something does seem wrong with what you highlighted.

 

[jher77]

Retracted.

 

[QuailinTN]

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
View attachment 2553639​

Ratio	Ounces	ML	Final %
1:19	1.7 ounces	50 ml	0.5%
1:39	0.85 ounces	25 ml	0.25%
1:99	0.425 ounces	12.6 ml	0.10%
1:199	0.21 ounces	6.2 ml	0.05%
1:399	0.11 ounces	3.125 ml	0.025%

---

13.3% Solution needed per gallon
View attachment 2553779​

Ratio	Ounces	ML	Final %
1:19	5.5 ounces	163 ml	0.5%
1:39	2.75 ounces	81 ml	0.25%
1:99	1.375 ounces	40.6 ml	0.10%
1:199	0.6875 ounces	20.3 ml	0.05%
1:399	0.34375 ounces	10.16 ml	0.025%

---

10.0% Solution needed per gallon
View attachment 2553820​

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%

Thx for info.

 

[casportpony]

Fixing to mix up some permethrin, looking at the charts...

Should these two parts of the 13% & 10% charts be switched.?

Let me check!

 

[casportpony]

Should these two parts of the 13% & 10% charts be switched.?

I made an error in the 13.3% table. This should be correct.

13.3%

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%

10%

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%

Post #1 has been updated & product pdf's have been added.

 

[Al Capon]

Thanks for all your hard work, you've save lots of us a bunch of time over the years.

 

[BesideStillWaters]

10.0% Solution needed per gallon
View attachment 2553820​

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%

I'm using this one. We didn't see any pre-mixed permethrin for poultry at Tractor when we bought this, but we are only treating 12 chickens, so we don't need a gallon. We've treated them three times (weekly), and within a week, the mites / lice come back. (Not sure which it is, I made a thread on it here though.) We mixed the 1:199 ratio but we only did 1/4 of a gallon because we didn't need more than that. We mixed 4 cups of water to 4 and 3/4 ml of permethrin. Can anyone here double-check my math? I ask because we are about to spray the chickens for the fourth time and the infestation is bad. I want to kill these mites / lice once and for all!

I'm considering mixing enough this time to dip the birds, but I really wanted to avoid that mess. I know they will be splashing it everywhere, and I've never dipped a bird so I don't know how to properly do it. So I'd really like to spray them again with the proper dilution.

Thanks!

 

[casportpony]

We mixed 4 cups of water to 4 and 3/4 ml of permethrin. Can anyone here double-check my math?

Looks good to me.