ナシヒメシンクイの卵およびふ化幼虫に対する各種殺虫剤の効果

抄録

Laboratory bioassays were conducted to determine the efficacy of insecticides including five pyrethroids, six organophosphates, four neonicotinoids, two diamides, one carbamate, one spinosyn, and one phenylpyrazole against Grapholita molesta. Pyrethroids, organophosphates, and a carbamate showed high efficacy, which prevented eggs from hatching and neonate larvae from entering the fruits. Neonicotinoids were also highly effective against both eggs and neonate larvae, except dinotefuran, the ovicidal activity of which against young eggs was insufficient. Diamides and a spinosyn had no ovicidal effect but showed moderate-to-high larvicidal activity. Phenylpyrazole was not effective against either eggs or neonate larvae. By combining the results of this study with the future data on residual activity of each insecticide under field conditions,appropriate spray programs for control of this pest can be developed.