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New Zealand Beekeeping Forums
New Zealand Beekeeping Disease & Pests
No evidence to support the use of glycerol–oxalic acid mixtures delivered via paper towel
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<blockquote data-quote="John B" data-source="post: 13559" data-attributes="member: 207"><p>One month into my fogging experiment and varoa numbers are still high. Hive one was so weak it was barely alive but still regularly supplying varoa.I have given it a frame of sealed brood and some young bees to help. Being run over by a truck (not me) didn't help.Hive two has increased in strength by 50% with even some early drone brood. The mite drop from this hive is very variable with a low of four and a high of 47 in the last week. Hive three is still weak but has increased in strength by about 50% and is looking healthy. A high of 85 this week compared to 252 last week. I have given this hive a frame of sealed brood as well . Hive four has gone from one box of bees down to 4 frames and still looks pretty bad with dead brood and deformed wing virus. Average drop still over 100 and sometimes over 200. Six 2gm treatments mostly five or six days apart. One treatment was delayed by bad weather and so there was seven days between treatments . Even on the last day there was still significant drops . These drops roughly doubled the next day after treatment.</p><p>I think I will increase the frequency of treatment to 4 days apart.</p><p>Fogging is definitely not a golden bullet but it also doesn't seem to do any harm which quite surprised me . I plan to keep going till either there is no varoa left or I start to see deleterious effects from the oxalic. I am becoming more and more convinced that it actually makes the hives healthier probably by controlling nosema .</p></blockquote><p></p>
[QUOTE="John B, post: 13559, member: 207"] One month into my fogging experiment and varoa numbers are still high. Hive one was so weak it was barely alive but still regularly supplying varoa.I have given it a frame of sealed brood and some young bees to help. Being run over by a truck (not me) didn't help.Hive two has increased in strength by 50% with even some early drone brood. The mite drop from this hive is very variable with a low of four and a high of 47 in the last week. Hive three is still weak but has increased in strength by about 50% and is looking healthy. A high of 85 this week compared to 252 last week. I have given this hive a frame of sealed brood as well . Hive four has gone from one box of bees down to 4 frames and still looks pretty bad with dead brood and deformed wing virus. Average drop still over 100 and sometimes over 200. Six 2gm treatments mostly five or six days apart. One treatment was delayed by bad weather and so there was seven days between treatments . Even on the last day there was still significant drops . These drops roughly doubled the next day after treatment. I think I will increase the frequency of treatment to 4 days apart. Fogging is definitely not a golden bullet but it also doesn't seem to do any harm which quite surprised me . I plan to keep going till either there is no varoa left or I start to see deleterious effects from the oxalic. I am becoming more and more convinced that it actually makes the hives healthier probably by controlling nosema . [/QUOTE]
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No evidence to support the use of glycerol–oxalic acid mixtures delivered via paper towel
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