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New Zealand Beekeeping Disease & Pests
Chalkbrood
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<blockquote data-quote="John B" data-source="post: 13060" data-attributes="member: 207"><p>Climate absolutely has an important part to play in just how much chalk brood you get but genetics are also important. When we first got chalk brood it was rampant and I do not believe that any hives in New Zealand are free of the spores. Selective breeding solved most of our problems but we had some marginal spring sites that we had to start shifting out for the winter\spring. The last couple of years it has become rampant again and I think the shocking weather has had some effect but I also wonder just how much effect poor breeder selection is having. Certainly round here the temperament of the bees is not as good as it was 10 years ago and I suspect a lot of beekeepers are just not doing proper selection for desirable traits .</p><p>If you have a major problem with chalkbrood then it can help to get new queens but get them from someone in a Climatic area where chalk brood is really bad and resistance has really been selected for.</p><p>I have heard anecdotally that lemon skins help with the problem and would be interested if anyone has any knowledge of if it works and how much.</p><p>In the past the chalk brood used to mainly clear up but now many hives have it as a constant companion.</p><p>I once had a hive that was absolutely riddled and was going to requeen it but decided to wait until after a field day that I was having at home so that I would have some to show the visitors. When they came two weeks later there was not a cell to be seen.</p><p>Calk brood probably came into New Zealand with the illegal importation of Caucasian queens. It's a shame no one was ever prosecuted but the person who did it is now no longer with us and I suppose its ancient history.</p></blockquote><p></p>
[QUOTE="John B, post: 13060, member: 207"] Climate absolutely has an important part to play in just how much chalk brood you get but genetics are also important. When we first got chalk brood it was rampant and I do not believe that any hives in New Zealand are free of the spores. Selective breeding solved most of our problems but we had some marginal spring sites that we had to start shifting out for the winter\spring. The last couple of years it has become rampant again and I think the shocking weather has had some effect but I also wonder just how much effect poor breeder selection is having. Certainly round here the temperament of the bees is not as good as it was 10 years ago and I suspect a lot of beekeepers are just not doing proper selection for desirable traits . If you have a major problem with chalkbrood then it can help to get new queens but get them from someone in a Climatic area where chalk brood is really bad and resistance has really been selected for. I have heard anecdotally that lemon skins help with the problem and would be interested if anyone has any knowledge of if it works and how much. In the past the chalk brood used to mainly clear up but now many hives have it as a constant companion. I once had a hive that was absolutely riddled and was going to requeen it but decided to wait until after a field day that I was having at home so that I would have some to show the visitors. When they came two weeks later there was not a cell to be seen. Calk brood probably came into New Zealand with the illegal importation of Caucasian queens. It's a shame no one was ever prosecuted but the person who did it is now no longer with us and I suppose its ancient history. [/QUOTE]
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