タバココナジラミバイオタイプNauruに対する各種薬剤の殺虫効果

抄録

The effect of pesticides on the Nauru biotype, a common biotype of Bemisia tabaci in the Ryukyu Islands, was compared with that on the B biotype under laboratory conditions. Twenty-four commercial agrochemicals were tested on adults, third instar larvae, and eggs. Overall, the majority of the pesticides tested were effective (>70% mortality) for Nauru, but not for the B biotype. Fourteen insecticides were effective for all stages of the Nauru biotype, while only two (pyridaben and emamectine benzoate) were effective for all stages of the B biotype. The effects of synthetic pyrethroid, imidacloprid, and some acaricides were clearly greater in the Nauru biotype than in the B biotype. The results suggest that the Nauru biotype is a less important pest than the B biotype because of the greater susceptibility to insecticides of the former.