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摘要
Experiments were conducted in three apiaries to assess the comparative efficacy of: Thymovar (Andermatt BioVet AG); Apiguard (Vita Europe Ltd., UK); an oxalic acid solution (OA) which consisted of 2.9% oxalic acid and 31.9% sugar in water; and amitraz fumigation, for controlling the honey bee mite Varroa destructor. Mite mortality increased significantly (p%26lt;0.001) in the Thymovar, Apiguard, OA or amitraz treated colonies. The relative mite mortality after: four OA applications, two Thymovar or two Apiguard applications during August and September in the Senicno apiary was 41.80% (+/- 14.31), 14.35% (+/- 10.71), and 18.93% (+/- 13.56), respectively. In the control, i.e. untreated colonies, the mite natural mortality was reduced by 3.10% (+/- 3.50). In the Bohinj apiary, two Apiguard applications and a single amitraz treatment resulted in reducing the mite populations by 19.71% (+/- 12.61) and 23.89% (+/- 14.25), respectively. At the Mediterranean located apiary of Vipava, the Thymovar and Apiguard treatments trigged 59.02% (+/- 17.28) and 46.50% (+/- 13.33) of the total mite reduction. In the Vipava apiary, colonies treated with any miticide during the brood period presented no difference (P%26gt;0.05) in efficacy. The results indicate that OA, Thymovar, Apiguard or amitraz fumigations are of limited use during the brood periods.
- 出版日期2012
