Shearer P W, Usmani K A
Department of Entomology, Rutgers, State University of New Jersey, Rutgers Agricultural Research & Extension Center, Bridgeton, NJ 08302-5919, USA.
Pest Manag Sci. 2001 Sep;57(9):822-6. doi: 10.1002/ps.367.
During the development of a resistance-monitoring bioassay that uses males as the life-stage tested, the relationship of adult female and male susceptibility of Grapholita molesta to different classes of insecticides was investigated. Preliminary results indicated that more males survived diagnostic doses of azinphos-methyl than females. Additional research revealed that, although the body mass of adult male G molesta was only 69% of that of female moths (5.67 and 8.20 mg, respectively), their LC50 values were 2.6, 4.1 and 10.3 times higher than those of females for azinphosmethyl, malathion and parathion-methyl, respectively. However, female G molesta moths were more tolerant to methomyl than were male moths. There was no indication that this sex-related response occurred in G molesta larvae. The results presented here raise concerns regarding the use of pheromone traps for determining whether insecticide treatments are required and as part of resistance monitoring programs.
在开发一种以雄性作为受试生命阶段的抗性监测生物测定法的过程中，研究了梨小食心虫成虫雌、雄对不同种类杀虫剂的敏感性关系。初步结果表明，在诊断剂量的甲基谷硫磷作用下，存活的雄虫比雌虫多。进一步研究发现，虽然成年雄性梨小食心虫的体重仅为雌性蛾的69%（分别为5.67毫克和8.20毫克），但它们对甲基谷硫磷、马拉硫磷和甲基对硫磷的半数致死浓度（LC50）值分别比雌性高2.6倍、4.1倍和10.3倍。然而，雌性梨小食心虫蛾对灭多威的耐受性比雄性蛾更强。没有迹象表明这种与性别相关的反应在梨小食心虫幼虫中出现。此处呈现的结果引发了对于使用性诱捕器来确定是否需要进行杀虫剂处理以及作为抗性监测计划一部分的担忧。
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