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New Zealand Beekeeping Forums
New Zealand Beekeeping Disease & Pests
Resistant varroa disaster.
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<blockquote data-quote="JohnF" data-source="post: 3015" data-attributes="member: 233"><p>You're exactly right Gino. Worldwide the current resistance markers to synthetic pyrethroids have been in a 'hotspot' where the chemical binds to the varroa protein and blocks it. One of 3 mutations in this very small hotspot have been linked to resistance. We developed an assay a few years ago that looks for these mutations and also scans the whole region for any other mutations.</p><p></p><p>Butyes, there could be some other mutation in the whole varroa DNA sequence . . .but no chance to find this unless people collect a sample of the varroa they believe to be resistant.</p></blockquote><p></p>
[QUOTE="JohnF, post: 3015, member: 233"] You're exactly right Gino. Worldwide the current resistance markers to synthetic pyrethroids have been in a 'hotspot' where the chemical binds to the varroa protein and blocks it. One of 3 mutations in this very small hotspot have been linked to resistance. We developed an assay a few years ago that looks for these mutations and also scans the whole region for any other mutations. Butyes, there could be some other mutation in the whole varroa DNA sequence . . .but no chance to find this unless people collect a sample of the varroa they believe to be resistant. [/QUOTE]
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Resistant varroa disaster.
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