All,

I ran a comparison of Apivar, Apistan, and Hopguard 2 at the end of
September last year in North Dakota. The groups had 25, 5, 12 hives
respectively with 16 controls, 58 total. Stickies underneath for three days
for the natural mite drop, then treatments were put on with new stickies
for nine days.

Average 24 hour mite drop for the four groups, pre-treatment: 108, 102,
104, and 103 for the control hives. (I know that's high. At least the
pre-treatment mite load was equal between the groups.) Average 24 hour mite
drop for the four groups, at the end of nine days with treatments in place:
37, 50, 45, and 26 for the controls.

I'm puzzled why the 24 hour drops would decrease with treatments on. I
didn't measure the hive strength beforehand, but I don't recall the hives
seeming any less populous at the end of treatment. Any ideas?

Tim Hiatt
eastern Washington

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