Combating Varroa destructor in honeybee colonies using flumethrin or fluvalinate
2007
Gregorc, A.,Agricultural Inst. of Slovenia, Ljubljana (Slovenia) | Smodis Skerl, M.I.,University of Maribor (Slovenia). Faculty of Agriculture
Mite mortality in two apiaries, one with 32 and the other with 15 honeybee (Apis mellifera carnica) colonies, was recorded prior to and after flumethrin or fluvalinate treatments and after a control, oxalic acid application. During the 42- and 51-day pre-treatment periods, the average daily natural mite drop was 0.04 (+/-0.04) and 2.82 (+/-2.19), respectively, which represents 1.09% (+/-1.06) and 3.84% (+/-3.04) of the total number of mites found during the experiment. The flumethrin or fluvalinate applications resulted in an average mite mortality at the two apiaries of 214.46 (+/-260.02) and 4,098.64 (+/-2,508.31). The treatments resulted in a 19.11% (+/-14.62) and a 39.28% (+/-10.47) reduction in the number of mites in slightly infested colonies and 94.30% (+/-4.26) and 96.24% (+/-3.14) in highly infested colonies. The difference in treatment efficacy between both apiaries was significant and indicates that fluvalinate and flumethrin are highly efficacious in dealing with highly infested honeybee colonies with sealed brood.
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