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Subject: Coumaphos reaction with fluvalinate
To: [log in to unmask]
From: [log in to unmask]
Cc: [log in to unmask]
Date: 07 Dec 1999 15:54:18 PST

Hi my friends, this is Dee. Question: remember the bad results in mixing fluvalinate with amitraz awhile back?Getting calls now on strange happenings with the new coumaphos: possible reaction? So I checked out some chemical books i just happen to have.....Question: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." If fluvalinate is a class 2 synthetic-pyrethroid and many beekeepers are now going to switch to coumaphos, has this warning under coumaphos not to use with pyrethrins been checked out? Does Germany where coumaphos is used also use fluvalinate safely or hasn't it been checked out either? I'd hate to see another amitraz/fluvalinate blowout repeated. Signed: Dee


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