What research has been done with soft chemicals ( Apivar, Apigard,  etc.    
), Tylan, and Terramycin  with respect to queens /  supercedure and bee 
problems?  There seems to be a lot of discussion about  fluvalinate, coumaphos, 
and Keith's article in July, 2014 ABJ about Copper  Napthenate and neonics.
 

I have been using Apigard for one and was interested.  We are putting  
these soft chemicals and chemicals for foul brood into our colonies.
 
Thanks,  Dave M

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