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New Zealand Beekeeping Forums
NZ Beginner Beekeepers
Two hives robbed and gone.
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<blockquote data-quote="AdamD" data-source="post: 12786" data-attributes="member: 173"><p>Yep, Treat and be damned is my view - the biggest risk time is as the days get shorter and brood-rearing reduces. So the brood numbers fall and the varroa numbers continue to increase. As varroa is in every hive, there's little point in counting them to see if there are lots or little in various hives before treatment as they will all need treating in any case.</p><p>The general reccomendation is to treat all colonies in an apiary at the same time.</p><p>In the years before varroa got as far as NZ, in the UK we had a large amount of varroa resistance to the original treatments that were avaiable to us - Bayvarol and Apistan so colonies started to die again. Or some beekeepers thought that they were saving money by using a 1/2 dose (!). Now that those treatments have not been used much for some years, it's OK to use them now and again.</p><p>One beekeeper I am in contact with has used Oxalic Acid and had to do multiple vaping treatments as it didn't work on some colonies sometimes - hence why it's worth checking afterwards.</p></blockquote><p></p>
[QUOTE="AdamD, post: 12786, member: 173"] Yep, Treat and be damned is my view - the biggest risk time is as the days get shorter and brood-rearing reduces. So the brood numbers fall and the varroa numbers continue to increase. As varroa is in every hive, there's little point in counting them to see if there are lots or little in various hives before treatment as they will all need treating in any case. The general reccomendation is to treat all colonies in an apiary at the same time. In the years before varroa got as far as NZ, in the UK we had a large amount of varroa resistance to the original treatments that were avaiable to us - Bayvarol and Apistan so colonies started to die again. Or some beekeepers thought that they were saving money by using a 1/2 dose (!). Now that those treatments have not been used much for some years, it's OK to use them now and again. One beekeeper I am in contact with has used Oxalic Acid and had to do multiple vaping treatments as it didn't work on some colonies sometimes - hence why it's worth checking afterwards. [/QUOTE]
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Two hives robbed and gone.
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