Hi Everyone,
Thanks Bob for the update on coumaphos resistance to coumaphos.  I will only add one comment.  Those hives that Dr Pettis found to contain coumaphos resistant varroa in the northeast US were treated successfully with apistan so at least at present it appears that switching back to apistan will give you an effective treatment but do remember to monitor after treatment to make sure the treatment worked.

blane



******************************************
Blane White
MN Dept of Agriculture
[log in to unmask]