Evaluating the Efficacy of Registered Acaricides on Varroa destructor and Tropilaelaps mercedesae, in Apis mellifera Colonies
2024
Oh, H.H. | Begna, T. | Jung, C.E.
Varroa destructor and Tropilaelaps mercedesae are the major ectoparasitic mites of honey bee (Apis mellifera). This study evaluated the efficacy of the five commercial acaricides registered for Varroa mite control (Coumaphos, Amitraz, Thymol, Formic acid and Oxalic acid) during the autumn season in reproductive colonies. The five chemicals were applied twice and followed by Fluvalinate treatment. The rate of mite fall and overall control efficacy were assessed based on the sticky board and sugar-shaking counts. For Varroa mite, the study found that Formic acid achieved the highest efficacy (72.3%), while Oxalic acid showed the lowest (50.0%). For Tropilaelaps mite, Formic acid also had the highest efficacy (59.2%), and Coumaphos the lowest (37.9%). Notably, Coumaphos showed statistically significant difference in controlling Varroa mite compared to Tropilaelaps mites. These results underscore the need for species-specific mite control strategies and contribute to integrated pest management approaches in apiculture.
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