Medications and pesticide withdrawal times for layers

[dawg53]

I read Paulson et al., 1972. Chickens were given 1 oral dose of carbaryl. After 12 days 0.33% of the single 10mg/kg body weight dose was found in the eggs. Less than 1% of the dose seems pretty low to me. Sounds like Farad has gone from allowing tiny amounts of residue to a flat out zero residues policy. Which was probably wise given that on large scale poultry farms carbaryl could easily be abused. Now, Johnson et al., 1963 showed that there were 0 days that any eggs contained any residues after dusting, but that after using a carbaryl dip residues persisted over 56 days. Ivey et al., 1984 also found that residues persisted after 56 days in eggs when chickens were DIPPED (they did not look at dust). Even then the residues were low and at no point during the study did levels exceed the 0.5ppm accepted levels at the time. At the 56 day mark the eggs had 0.01ppm residue. Given that dusting and dipping and oral are all different methods of medicating the birds and seem to have different residue times, its hard to judge a good withdrawal time to be 100% carbaryl free, but if I had to use it (the dust) I'm an overly cautious person, I'd follow the dip residue times and withhold eggs for 6-8weeks.

LOL. What knucklehead gives their chickens carbaryl orally? I dont know any chicken owners that gives their birds carbaryl orally.
I've used both the Sevin dust and liquid concentrate before on chickens. I did not dip them with the liquid, I used a spray bottle to spray them. I'm still here typing.
I ended up switching to Permethrin dust due to carbaryl resistance by a small lice problem I was dealing with. The Permethrin took care of the problem.

 

[cassy]

LOL. What knucklehead gives their chickens carbaryl orally? I dont know any chicken owners that gives their birds carbaryl orally.
I've used both the Sevin dust and liquid concentrate before on chickens. I did not dip them with the liquid, I used a spray bottle to spray them. I'm still here typing.
I ended up switching to Permethrin dust due to carbaryl resistance by a small lice problem I was dealing with. The Permethrin took care of the problem.

Haha I though the same thing, who is out there feeding this stuff to their birds? It's probably large scale farms who would give it orally. You can't possibly dip or dust every bird when you have 100's or 1000's of them.

 

[dawg53]

Haha I though the same thing, who is out there feeding this stuff to their birds? It's probably large scale farms who would give it orally. You can't possibly dip or dust every bird when you have 100's or 1000's of them.

Actually they dont bother treating for external or internal parasites at all since the layers lifespan is only 2 years. Then a batch of young newbies are brought in while the "old" hens are sent off to be processed for whatever....