In a message dated 06/11/2006 11:39:17 GMT Standard Time, [log in to unmask]
writes:
This year I haven't seen more than a few mites on boards, but do see
hives affected by DWV in August. And yes, I do backup treatment with
oxalic later to ensure there is no resistance to fluvalinate.
I'm not sure that this would necessarily have the effect you assume. Aren't
you just selecting for resistance to 2 chemicals rather than one if you
continue to use fluvalinate annually? I try to use it no more frequently than 1
year in 4 as part of IPM and I try to program it so the brood comb exposed to
it is replaced the following spring.
Chris
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