On Wed, Jul 20, 2016 at 4:47 AM, Ghislain De Roeck <[log in to unmask]>
wrote:
> So is there anything out there on persistence and sequential harm with
vapor?

Can this help:
http://www.agroscope.admin.ch/imkerei/00316/00329/02081/index.html?lang=en

Thanks but it did not answer my question about persistence- how long it
keeps killing after treatment. Knowing that would lead to a proper interval
for vapor treatments. You can find intervals of four to 7 days which led to
my question.

BTW, my less than rigorous test using one untreated hive and one treatment
with vapor about a month before on three hives led to about half the number
of Varroa for the treated hives compared to the untreated.

Bill Truesdell
Bath, Maine

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