Allen Dick said:

> Has anyone answered this question yet?

>> In my Agricultural Chemicals Book 1 Insecticides, 1992 revision,
>> by W.T. Thomson, page 220 now quoted in reference to using coumaphos
>> "Do not use before or after application of natural or synthetic
>> pyrethrins or compounds used to synergize them."

While I do not have the book cited, and the context in which the
statement was made is not mentioned, the quote seems to be a warning
that is specific to cattle, rather than bees.

Here's an example of this exact concern as translated into practical
"application advice" (in section "C", "Coumaphos"):

http://www.ent.uga.edu/pmh/Animals/Beef_Cattle_Insecticide_Mixing.htm

   "Do not apply in conjunction with oral drenches
   or other internal medications nor with natural
   pyrethrins or synthetic pyrethoids or their
   synergists or with other cholinesterase inhibitors."

As one with some experience in reading and understanding these types of
warnings, it appears to me that, even for cattle, the advisory is limited
to applications of coumaphos and pyrethrins within very short spans of time,
like "same day" or "same spraying".

Note that this is not even a required label warning or label advisory
for either class of chemicals, so I'd guess that there is not even
a consensus about this "risk" in regard to cows, sheep, and other mammals.

Anyone cowed by an out-of-context quote may be getting a bum steer.
I don't want to horn in, but someone must present the udder point
of view if both sides are to be herd.  I'm milking this for all
it is worth, and many may beef about this, but I could go on until
the cows come home.


                jim

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