Maggi Matías Daniel, Ruffinengo Sergio R, Damiani Natalia, Sardella Norma H, Eguaras Martín J
Laboratorio de Artrópodos, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, Funes, 3350, 7600, Mar del Plata, Argentina.
Exp Appl Acarol. 2009 Apr;47(4):317-20. doi: 10.1007/s10493-008-9216-0. Epub 2008 Nov 14.
In Argentina, studies on Varroa destructor resistance to coumaphos are still unknown. At present, high infestation levels of V. destructor are being detected in colonies of Apis mellifera after treatment with this acaricide. The aim of the present study was to determine the LC50 of coumaphos in V. destructor from four apiaries with high mite density after treatment with coumaphos. The LC50's were 112, 319, 127 and 133 microg/Petri dish for mites from the four apiaries. Significant LC50 differences were detected between resistant and susceptible mites. LC50 increased 197-559-fold when compared to the corresponding baseline, suggesting the development of resistance. These results are the first report of resistance to coumaphos in V. destructor in Argentina.
在阿根廷，关于狄氏瓦螨对蝇毒磷抗性的研究仍不为人知。目前，在用这种杀螨剂处理后，在意大利蜜蜂蜂群中检测到了高螨害水平。本研究的目的是确定在用蝇毒磷处理后，来自四个螨密度高的养蜂场的狄氏瓦螨对蝇毒磷的半数致死浓度（LC50）。来自这四个养蜂场的螨的LC50分别为112、319、127和133微克/培养皿。在抗性螨和敏感螨之间检测到了显著的LC50差异。与相应的基线相比，LC50增加了197至559倍，表明产生了抗性。这些结果是阿根廷狄氏瓦螨对蝇毒磷抗性的首次报道。
