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Help! Lice crawling all over me after holding sick hen - Page 2

post #11 of 13
Sometimes it "helps" when an enthusiastic newbie comes on board? I actually like periodically reviewing all my old assumptions/information, so I do a lot of mentoring for interns and what not...bursting with all the information and research they learned in school. We usually end up teaching each other!

Anyway, I continued to look into it, and this paper from Europe must be where the info for my withdrawal time came from. It says that permethrin was detectable in the eggs at a very low level 2.5 ug/kg at 21 days. They made 5ug/kg the cut-off for acceptable levels, which means you could technically eat the eggs at three weeks, but I arbitrarily added a week--figured that would bring the number even closer to zero...

http://www.ema.europa.eu/docs/en_GB/document_library/Maximum_Residue_Limits_-_Report/2009/11/WC500015598.pdf

Now this was for the cis-isomer...the trans-isomer was found to clear a lot quicker. I don't know which isomer is used in the common product...I'm going to go now to see if I can find out.
post #12 of 13
Looks like they're a mix of isomers. Here's one that's 45/55%:

http://www.drugs.com/vet/y-tex-gardstar-garden-poultry-dust.html

The info on isomers is just below the active ingredient information. If you have a different brand, you can probably look it up on the same website, or it might be on the can.
post #13 of 13
Quote:
Originally Posted by Jensownzoo View Post

Sometimes it "helps" when an enthusiastic newbie comes on board? I actually like periodically reviewing all my old assumptions/information, so I do a lot of mentoring for interns and what not...bursting with all the information and research they learned in school. We usually end up teaching each other!

Anyway, I continued to look into it, and this paper from Europe must be where the info for my withdrawal time came from. It says that permethrin was detectable in the eggs at a very low level 2.5 ug/kg at 21 days. They made 5ug/kg the cut-off for acceptable levels, which means you could technically eat the eggs at three weeks, but I arbitrarily added a week--figured that would bring the number even closer to zero...

http://www.ema.europa.eu/docs/en_GB/document_library/Maximum_Residue_Limits_-_Report/2009/11/WC500015598.pdf

Now this was for the cis-isomer...the trans-isomer was found to clear a lot quicker. I don't know which isomer is used in the common product...I'm going to go now to see if I can find out.
Quote:
Originally Posted by Jensownzoo View Post

Looks like they're a mix of isomers. Here's one that's 45/55%:

http://www.drugs.com/vet/y-tex-gardstar-garden-poultry-dust.html

The info on isomers is just below the active ingredient information. If you have a different brand, you can probably look it up on the same website, or it might be on the can.

Yes. Again, thanks for all you help and links. Lord knows I hate being told I'm wrong (don't we all), but I hate spreading misinformation or inaccurate information more.

And yeah, it's always good to have fresh eyes on the subject. The more people the better, if you ask me - that's why I try hard to help any newcomers to the hobby receive good and accurate information. Someday maybe they'll be teaching people and helping newbies too (and sometimes even us experienced folks!), and I want to get them off to the best start possible.

200 something birds. 8 species. ♥ Norman ♥ Norma ♥ Misha ♥ and ♥ Taylor ♥ are my babies.
Visit Norman the Rooster's Thread Here!
Breeding Sex Linked Silkies, Gamefowl, and EEs/OEs. Amateur genetics buff. Caponization practitioner/advocate.
Working at The Poultry Palace in Placerville, CA. Come see us for started pullets, chicks, Bar Ale feed, & more!

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200 something birds. 8 species. ♥ Norman ♥ Norma ♥ Misha ♥ and ♥ Taylor ♥ are my babies.
Visit Norman the Rooster's Thread Here!
Breeding Sex Linked Silkies, Gamefowl, and EEs/OEs. Amateur genetics buff. Caponization practitioner/advocate.
Working at The Poultry Palace in Placerville, CA. Come see us for started pullets, chicks, Bar Ale feed, & more!

Reply
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