Colonies were treated with flumethrin and/or oxalic acid and with flumethrin, oxalic acid or amitraz. The efficacy of flumethrin averaged 73.62% compared to 70.12% for three oxalic acid. A reduction of 12.52% in mite numbers was found 4 weeks after flumethrin application in colonies with low infestation levels, while 4 oxalic acid applications produced significantly higher (P ( 0.05) mite mortality, an average of 24.13%. Four consecutive amitraz fumigations produced a 93.82% reduction on average in final mite numbers and thus ensure normal colony development and overwintering. The study demonstrated the efficacy of synthetic acaricides in comparison to appropriate organic treatments.
COBISS.SI-ID: 3588456