Teodoro Adenir V, Pallini Angelo, Oliveira Claudinei
Animal Biology Department/Entomology, Federal University of Viçosa, Viçosa, MG, 36571-000, Brazil.
Exp Appl Acarol. 2009 Apr;47(4):293-9. doi: 10.1007/s10493-008-9219-x. Epub 2008 Nov 14.
We used a Y-tube olfactometer to assess the sub-lethal effects of the acaricide fenbutatin oxide on the olfactory response of the predatory mite Iphiseiodes zuluagai towards odours from: (1) air or undamaged coffee plants; (2) undamaged or red spider mite Oligonychus ilicis-infested coffee plants; (3) undamaged or false spider mite Brevipalpus phoenicis-infested coffee plants. Predatory mite adult females were exposed to residues of fenbutatin oxide or distilled water on leaf discs during a period of 72 h prior experiments. When exposed to distilled water (control treatments), predatory mites significantly preferred undamaged plants over air, O. ilicis-infested plants over undamaged plants, and they did not prefer B. phoenicis-infested plants over undamaged plants. However, predatory mites that had been exposed to residues of fenbutatin oxide were neither attracted towards undamaged plants nor to O. ilicis-infested plants. Thus, fenbutatin oxide affected negatively the olfactory response of I. zuluagai. We conclude that sub-lethal-effect studies should be considered in pesticide selectivity programs since the ability of predatory mites to locate their prey may be negatively affected by non-lethal concentrations of pesticides.
我们使用Y型嗅觉仪评估杀螨剂苯丁锡对捕食螨祖鲁艾氏钝绥螨嗅觉反应的亚致死效应，该效应针对以下气味来源：（1）空气或未受损的咖啡植株；（2）未受损或受红叶螨奥利戈尼氏叶螨侵害的咖啡植株；（3）未受损或受假叶螨短须螨侵害的咖啡植株。在实验前72小时期间，将捕食螨成年雌螨暴露于叶盘上的苯丁锡残留物或蒸馏水中。当暴露于蒸馏水（对照处理）时，捕食螨显著偏好未受损植株而非空气，偏好受奥利戈尼氏叶螨侵害的植株而非未受损植株，且它们不偏好受短须螨侵害的植株而非未受损植株。然而，暴露于苯丁锡残留物的捕食螨既不被未受损植株吸引，也不被受奥利戈尼氏叶螨侵害的植株吸引。因此，苯丁锡对祖鲁艾氏钝绥螨的嗅觉反应产生了负面影响。我们得出结论，在农药选择性计划中应考虑亚致死效应研究，因为捕食螨定位其猎物的能力可能会受到非致死浓度农药的负面影响。
