Hello All. All this recent talk about varroa floors/traps and all got me thinking - a dangerous thing. The recomended method of testing varroa infestations (USA) is to install a varroa trap, and insert Apistan strips. Then 24 hours later, pull out the trap - do the count - and determine if the levels are sufficient for treating. If the levels are low, the strips are pulled out of the hive, otherwise the strips are left in. Here comes my Question... Could the repeated testing for varroa lead to breeding resistant mites??? In the one day that the strips are in the hive, the easily suseptible mites are killed, but the ones that remain are a little tougher and were not killed. These tougher mites then continue to breed until the next test. Given the fact that the overall mite populations are low, and the easily killed mites are removed, this would result in a higher percentage of mites that were not initially affected by the apistan. Over the course of a year or two, you might have a hive full of mites, but a the test will not reveal the true populations because the mites are not killed by the apistan within 24 hours. Any thoughts on this from the bug and chemical people out there!! Rod Billett Lexington, South Carolina USA