Subject: | |
From: | |
Reply To: | |
Date: | Thu, 30 Nov 2006 19:13:22 -0500 |
Content-Type: | text/plain |
Parts/Attachments: |
|
|
On 29-Nov-06, at 11:35 PM, Peter Dillon wrote:
> Resistance (tolerance) to the presence of Oxalic acid by Varroa
> mites should be an interesting phenomena to study.
Hi Peter and all
While I believe Oxalic as well as Formic acids have been studied(in
Canada and Europe where they are legal) I don't know the answer. The
question of 'how does Oxalic damage the mites?' was asked at our
recent meeting of the Dufferin Beekeepers Assoc.
The instructions for using Oxalic on varroa mites, as published by
the Canadian Honey Council, state that it must be done late in the
fall when there is no brood present, that it should not be used more
than once per season and it should be used in support of another
approved treatment(ie formic, apistan) as a final 'cleanup' treatment
Resistance to various chemicals is documented, but I have never seen
any reports of resistance to Formic acid or Oxalic.
Bob Darrell
Caledon Ontario
Canada
80W44N
-- Visit www.honeybeeworld.com/bee-l for rules, FAQ and other info ---
|
|
|