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Date: | Tue, 14 Apr 2020 16:18:47 +0000 |
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I find it odd that they did not also look at varroa control. What if that oxalic treatment, which appears perfectly safe, did nothing to the mites? What if the formic treatment, which appears hard on the brood, was much more effective on knocking the mites down? Why was that not included?
I did a lot of research on this area. I found that results of oxalic acid sublimation will be dependant on brood presence in the hive. If there is no brood the efficacy will be over 90%. This also depends on what applicator is used. I used Varroax as well as the mecahine was developed in my laboratory based on varroax and controlled temp. I also have tested machines that have temp control device such as Pro Vap. They also have similar activities as varroax. I have not tested the big guns “Bazookas”.
For Formic acid application, it is a different control agent. As we know it does work on mites on bees and also mites in the brood depending on the method of application and the ambient temperature. Check the labels on Formic acid products and follow the instructions. There is also a warning on the label about brood kill. In some cases beekeepers reported queens kill, too.
In a nutshell each method of oxalic acid or Formic acid application has pros and cons. Beekeeper has to decide what is appropriate method for time of the year and how much risk is welling to take. After any treatment regardless, monitor mite population to ensure that you achieved your expected kill. Don’t forget if there is brood your mite shakes Will not give best results. This is due to you are Measuring mites on bees. Using a sticky board for 3 days will be best way to determine mite infestation at the end of the year if brood expected in the hive.
Medhat Nasr Edmonton Alberta Canada
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