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New Zealand Beekeeping Forums
New Zealand Beekeeping Disease & Pests
Resistant varroa disaster.
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<blockquote data-quote="John B" data-source="post: 3063" data-attributes="member: 207"><p>I have found the relevant entry in my diary 6\3\2018</p><p>four hives strong one story hives given standard alcohol wash and then Given four bayvarol strips from a brand-new packets.</p><p>Mite numbers were 52 33 55 72 This is later than I would normally treat but I was saving these hives for this experiment plus these were varoa tolerant queens I was testing.</p><p>27\3 37 15 22 63 A moderate reduction in mite numbers.</p><p>6\4 31 22 45 105 </p><p>at this stage hive number four had quite bad PMS and the trial was discontinued with the hives being treated with apivar.</p><p>Hives in the same apiarys that were treated with apivar were mite free On 6/4.</p><p>I conducted this trial because an apiary that I had treated in the spring with bayvarol Was showing significant varoa in early January. I treated these hives with bayvarol again on 18 January 2018. I did this specifically to see if it was the bayvarol or something else causing the problem. When I checked on 27 February all hives had bad varoa and I made a note that I expected half the hives not to survive. These hives were treated that day with apivar and in the end I lost 4/16 hives.</p><p>I promptly told the world what I had found and all I got for my troubles was being told that it must be reinvasion or that I hadn't put the strips in properly. Funny how the other hives at home didn't get any reinvasion and in the apiary with all the trouble all the reinvasion stopped as soon as I put different strips in.</p><p>Either there were two completely different batches of bayvarol that were duds or I had resistance.(They can't have been dud strips because I sent them away to be tested and they were fine)</p><p>Last autumn there were numerous reports of amatraz impregnated strips failing and this was definitely a case of dud strips as the varoa problem cleared straight up when people used the other product with the same active ingredient. Thousands of hives were affected by this failure yet there has been no publicity or enquiry by either the manufacture or authoritys. I guess the manufacturer doesn't want to be sued for loss of hives just as I haven't mentioned product names because though I am 100% sure it happened I'm not hundred percent sure I could defend myself against a smart lawyer.</p></blockquote><p></p>
[QUOTE="John B, post: 3063, member: 207"] I have found the relevant entry in my diary 6\3\2018 four hives strong one story hives given standard alcohol wash and then Given four bayvarol strips from a brand-new packets. Mite numbers were 52 33 55 72 This is later than I would normally treat but I was saving these hives for this experiment plus these were varoa tolerant queens I was testing. 27\3 37 15 22 63 A moderate reduction in mite numbers. 6\4 31 22 45 105 at this stage hive number four had quite bad PMS and the trial was discontinued with the hives being treated with apivar. Hives in the same apiarys that were treated with apivar were mite free On 6/4. I conducted this trial because an apiary that I had treated in the spring with bayvarol Was showing significant varoa in early January. I treated these hives with bayvarol again on 18 January 2018. I did this specifically to see if it was the bayvarol or something else causing the problem. When I checked on 27 February all hives had bad varoa and I made a note that I expected half the hives not to survive. These hives were treated that day with apivar and in the end I lost 4/16 hives. I promptly told the world what I had found and all I got for my troubles was being told that it must be reinvasion or that I hadn't put the strips in properly. Funny how the other hives at home didn't get any reinvasion and in the apiary with all the trouble all the reinvasion stopped as soon as I put different strips in. Either there were two completely different batches of bayvarol that were duds or I had resistance.(They can't have been dud strips because I sent them away to be tested and they were fine) Last autumn there were numerous reports of amatraz impregnated strips failing and this was definitely a case of dud strips as the varoa problem cleared straight up when people used the other product with the same active ingredient. Thousands of hives were affected by this failure yet there has been no publicity or enquiry by either the manufacture or authoritys. I guess the manufacturer doesn't want to be sued for loss of hives just as I haven't mentioned product names because though I am 100% sure it happened I'm not hundred percent sure I could defend myself against a smart lawyer. [/QUOTE]
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