2005年および2006年に鹿児島に飛来したトビイロウンカの薬剤感受性

抄録

The insecticide susceptibility of the brown planthopper (BPH), Nilaparvata lugens that immigrated into Kagoshima Prefecture in 2005-2006 was investigated using the bell-jar dusting chamber method. BPMC, etofenprox, silafluofen, dinotefuran and buprofezin-fthalide-flutolanil demonstrated good efficacy against BPH. The susceptibility of BPH to insecticides was evaluated using the young rice root dipping method conducted in seedling boxes. The BPH populations that immigrated into Kagoshima Prefecture in 2005-2006 were compared with those that immigrated into Nagasaki Prefecture in 1999. Susceptibility to fipronil did not vary much between the 3 populations, while susceptibility to imidacroplid appeared to decline more apparently in the Kagoshima population than in the Nagasaki population.