I surveyed my local bee club anonymously about oxalic acid use. The response rate wasn't the greatest ( as expected with beekeepers ), but those who used only oxalic acid vaporization on average did it 12 times and had about 50% survival rates.I think the best thing is to use other interventions to go along with OAV.
I surveyed my local bee club anonymously about oxalic acid use. The response rate wasn't the greatest ( as expected with beekeepers ), but those who used only oxalic acid vaporization on average did it 12 times and had about 50% survival rates.
Those who used oav in conjunction with another treatment, on average did 4 treatments and had 66% survival rates.
I think he said he was relying on past information he had picked up when he answered the question about mites moving into brood cells. It was not based on a particular study.First of all we need to note that according to the male researcher who ran this mite thing through a computer model came up with a statement that mites would only be phoretic for 4 days and then they go do 7 treatments 5 days appart, no mention on how they treated and the dosage or the purity of the acid. Maybe one of the parrameters in his computer model was that bees lived of the haemolymph of bee, who knows, As for 50% losses for those who treat with OAV well some folks treat with all sorts of stuff and often lose 100% so that tells me nothing. I have been using OAV alone for at least 8 years now with over winter losses below 10% but then I must be lucky or something, it seems the harder I work at it the luckier I get. At present I will treat at least 14 times a year 15 if I can. It startwith 3 weeks of treatment on Mondays and Fridays of each week as soon as my honey is harvested, the same again in late August to make sure that I will have mite free winter bees and then single treatments in November December and again in January if I can find a good day for it. Losses I have are mostly from starvation or queen loss during the winter. For 8 years now experts have been telling me that OAV in bees with brood does not work as OAV only kills phoretic mites, so Apivar only kills phoretic mites, Apiguard as well come to think of it so the only thing that is supposed to kill all mites is Formic acid treatments but I am not so sure about that either and it sure can kill bees and queens from time to time. As to bee clubs, we had quite a large club down here in the Northern neck of which there were a handfull of successful beekeepers most of the rest kept me busy suppling nucs year after year.
It seems to be heavily dependent on climate.Remember, just because the Georgia study did not reduce the mite counts, that does NOT mean oxalic treatments cannot be successful in a IPM strategy. They did not give the study’s details except they used 18g shop towels and use OAV every four days... and did alcohol washes. The devil is in the details.
A report from Florida suggests the best knockdown results for OAV happened when two day intervals were used. More creative research would be useful using two and three day intervals for various lengths of time.
Randy Oliver started with shop towels, but his operation has moved to two 25g Swedish sponges. The Georgia study probably ran for 30 days, but Oliver finds at least 42 days gives better results.
So a single study does not mean oxalic does not work. It worked well in a study from Ontario too, and many others. IMHO it will be one of the main treatments of our future.
Yes, but he also stated that’s why he doesn’t move bees South any longer. He describes a break in brood rearing where he is at that doesn’t occur in South Georgia. So very climate dependent as others have said. There’s really not an argument over OAV working when you have that brood rearing break.What was glossed over was Bob talking about how he "nailed the mites" using OAV.
also she stated she was doing every 5 days,, many here do every 4, maybe also has an impact.Awesome, I think you really have to look at their research, there is no disconnect. Everyone knows that OAV will not treat under the wax capping, in an area where there is no true break in brood rearing this is not surprising. To hold the mites level in such area is very much controlling, they at no point mention creating a break in brood either because this is not what they looking for. If they had created a break in the brood cycle by manipulation the mite load would have dropped. None of these research’s are claiming that OAV is not effective. They are saying in that area of Georgia it is not enough. So you are looking at research that proves just because this works in one area of the US, or what ever country does not mean it will be effective for the whole. Due to the fact that OAV treatment is very much dependent on a break in the brood cycle. Very good video, thank you for posting.
Yes, I would like to see a few more details of their study. Tightening the intervals, increasing the dosage and number of vaporizations, monitoring untreated colonies in the same yard, etc. You could be killing mites very effectively but where there is a huge in drift from neighboring bees, indications might be that OAV was ineffective. In that circumstance, really, what would be?also she stated she was doing every 5 days,, many here do every 4, maybe also has an impact.