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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: 2853" data-attributes="member: 207"><p>There appears to be a massive resistance problem with synthetic pyrethroids in at least some parts of the North Island and I am getting reports of very high hive losses from multiple beekeepers.</p><p>I have talked to Michelle Taylor from plant and food but without concrete evidence it is hard for her to take my concerns any further .</p><p>What we need is for people to do a Pettis test on hives that appear to be showing resistance. One quarter cup of bees into a ventilated jar with a piece of the suspect strip stabled onto a piece of cardboard. Leave for six hours and count how many mites have died then alcohol wash the bees and see how many are left.That is the basic Pettis test but I suggest you look it up to get the details right. I would post it but as usual have no idea how.</p><p>I have seen nothing official on this problem apart from a few vague hints to make sure your treatments are working. Well from what I'm hearing when some of you go and check you are going to get a very unpleasant surprise.</p><p>We are not talking about a few hundred or even a few thousand hives dying. This is likely to be the biggest hive loss event that the country has ever seen .</p><p>Some of the damage will be repairable if enough people wake up in time but we need at least some accurate information on hive losses and proven resistance to get the wheels rolling.</p></blockquote><p></p>
[QUOTE="John B, post: 2853, member: 207"] There appears to be a massive resistance problem with synthetic pyrethroids in at least some parts of the North Island and I am getting reports of very high hive losses from multiple beekeepers. I have talked to Michelle Taylor from plant and food but without concrete evidence it is hard for her to take my concerns any further . What we need is for people to do a Pettis test on hives that appear to be showing resistance. One quarter cup of bees into a ventilated jar with a piece of the suspect strip stabled onto a piece of cardboard. Leave for six hours and count how many mites have died then alcohol wash the bees and see how many are left.That is the basic Pettis test but I suggest you look it up to get the details right. I would post it but as usual have no idea how. I have seen nothing official on this problem apart from a few vague hints to make sure your treatments are working. Well from what I'm hearing when some of you go and check you are going to get a very unpleasant surprise. We are not talking about a few hundred or even a few thousand hives dying. This is likely to be the biggest hive loss event that the country has ever seen . Some of the damage will be repairable if enough people wake up in time but we need at least some accurate information on hive losses and proven resistance to get the wheels rolling. [/QUOTE]
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New Zealand Beekeeping Disease & Pests
Resistant varroa disaster.
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