Re: apivar question
Same. If the tab is used the strip tends to bend sideways and the bees eat out part of one of the combs because of that, I put a nail or stick through the hole & the strip hangs straight down.
The active ingredient, Amitraz, slowly seeps out of the strip and gets on the bees as they brush against the strip. Once out of the strip and on the bees it has a 1/2 life of only a few days before breaking down, so for good results the strips must be within the cluster to have the product circulating in the hive continuously.
Long as it's done right Apivar is pretty effective it can pull a hive back from the brink of death. As the Amitraz breaks down there is no permanent Amitraz residue left in the hive which is why I personally favour it over the other strip treatments such as Apistan etc. Some of the products the Amitraz breaks down into may be left in the hive but not toxic like the residues of Apistan or similar.
44 years, been commercial, outfits up to 4000 hives, now 120 hives and 200 nucs as a hobby, selling bees. T (mostly).