ツマグロヨコバイにおけるカーバメート系殺虫剤抵抗性とその機構

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Seven populations of the green rice leafhopper, Nephotettix cincticeps, used in this study were collected in the fields where carbamate insecticides had become ineffective. They showed high resistance to carbamate insecticides at the same or a little less degree as the Nakagawara strain, and their resistance spectrum against carbamate insecticides were also similar to that obtained in the Nakagawara strain. Synergistic effects of piperonyl butoxide, tri-o-crecyl phosphate and triphenyl phosphate to carbamate insecticides were not remarkable in four of the resistant populations tested as in the case of a susceptible strain. Cholinesterase obtained from the seven resistant populations showed almost the same level of activity, but the enzyme from the resistant populations was much less inhibited by the carbamate insecticides than that from the susceptible strain. In the moderately resistant Ozu population, a plateau was observed at about 70% mortality on the dosage-mortality curve. In this population a decline of sensitivity of the cholinesterase to carbamate insecticides was also detected. These results suggested that the resistance in the resistant populations used in this study was caused by lowered sensitivity of cholinesterase to the insecticides as previously shown in the Nakagawara strain. Therefore, the presence of the less sensitive cholinesterase is considered to be a general mechanism of carbamate-resistance in this insect.
日本応用動物昆虫学会の論文
1973-09-25

ツマグロヨコバイにおけるカーバメート系殺虫剤抵抗性とその機構

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