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New Zealand Beekeeping Forums
New Zealand Beekeeping Disease & Pests
Triple treating to prevent Varroa ?
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<blockquote data-quote="John B" data-source="post: 10654" data-attributes="member: 207"><p>Unless they are in extremely high numbers the main damage done by varoa is the spreading of viruses to the bees and this is what is killing a lot of hives at the moment. There is a lot of evidence that this problem gets worse every year and in effect every year it takes less varoa each year to kill a hive and I'm pretty convinced New Zealand has now reached the point where two treatments cannot be relied upon to keep a hive alive. Some people will get away with two treatments and others won't. This autumn for the first time I did not get away with only two treatments and have suffered losses accordingly even though I treated in a timely manner and there was no sign of resistance to treatment, a lot of hives with what I considered only moderate varoa numbers and no sign of PMS still succumbed to the viruses and many others were heavily impacted. This is not what I consider normal but unfortunately it is going to become so and three treatments will be absolutely necessary for most people in the very near future. Some of the early literature talked about it taking three years for varoa to kill a hive. That has never been the case in New Zealand probably because we have a very long breeding season which gives varoa lots of opportunities to reproduce.</p><p>How commercial beekeepers are going to deal with this I don't know. If you are a hobbyist and have the time then you could certainly help control varoa and thus the viruses by doing things like drone brood trapping and even caging the Queen to give a broodless period and treating with oxalic acid.</p><p> I always advocated for the eradication of varoa and the cost of eradicating it would have been cheap even if it had meant destroying every hive in the North Island compared to the ongoing cost of treatment and the ever increasing number of hives that are succumbing to the varoa.</p><p>Keeping bees is going to become increasingly more difficult and expensive.</p></blockquote><p></p>
[QUOTE="John B, post: 10654, member: 207"] Unless they are in extremely high numbers the main damage done by varoa is the spreading of viruses to the bees and this is what is killing a lot of hives at the moment. There is a lot of evidence that this problem gets worse every year and in effect every year it takes less varoa each year to kill a hive and I'm pretty convinced New Zealand has now reached the point where two treatments cannot be relied upon to keep a hive alive. Some people will get away with two treatments and others won't. This autumn for the first time I did not get away with only two treatments and have suffered losses accordingly even though I treated in a timely manner and there was no sign of resistance to treatment, a lot of hives with what I considered only moderate varoa numbers and no sign of PMS still succumbed to the viruses and many others were heavily impacted. This is not what I consider normal but unfortunately it is going to become so and three treatments will be absolutely necessary for most people in the very near future. Some of the early literature talked about it taking three years for varoa to kill a hive. That has never been the case in New Zealand probably because we have a very long breeding season which gives varoa lots of opportunities to reproduce. How commercial beekeepers are going to deal with this I don't know. If you are a hobbyist and have the time then you could certainly help control varoa and thus the viruses by doing things like drone brood trapping and even caging the Queen to give a broodless period and treating with oxalic acid. I always advocated for the eradication of varoa and the cost of eradicating it would have been cheap even if it had meant destroying every hive in the North Island compared to the ongoing cost of treatment and the ever increasing number of hives that are succumbing to the varoa. Keeping bees is going to become increasingly more difficult and expensive. [/QUOTE]
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Triple treating to prevent Varroa ?
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