抄録
Since 2002, the cabbage looper Trichoplusia ni (Hubner), a serious lepidopterous insect pest of cruciferous vegetables in other parts of the world, has often occurred in Aichi Prefecture. Therefore, in the present study, the susceptibility of T. ni to 22 insecticides was evaluated by the leaf dipping method.
T. ni showed low susceptibility to organophosphorus insecticides but high susceptibility to other insecticides such as carbamates, pyrethroids, nereistoxins and Bt. However, it showed high susceptibility to lufenuron, flubendiamide, and indoxacarb. In addition, the susceptibility of T. ni to various insecticides was comparable to that of the common cutworm Spodoptera litura (Fabricius), which is the most serious lepidopterous insect pest of crciferous vegetablesin Japan.
Although T. ni showed lower susceptibility to PAP, acephate, and pyridalyl than S. litura, its susceptibility to other insecticides was as high as that of S. litura. These results indicate that T. ni can be easily controlled using insecticides that are effective against the common cutworm except for organophosphorus insecticides.
