Development of insecticide resistance in the brown planthopper and the white backed planthopper
Among the rice leaf of planthoppers in Japan, the brown planthopper and the white backed planthopper are very slow in acquiring insecticide resistance and this has been considered to be due partly to their migratory behavior. However, development of organophosphate resistance in the brown planthopper was confirmed from the tropical LD50 values obtained between 1967-1976 but no substantial change in susceptibility for the white backed planthopper was observed during these years. The two planthoppers were collected from several locations in their possible migration sources to measure the levels of insecticide susceptibilities. A Philippine strain and a Thailand strain of the two planthoppers showed remarkably different pattern of insecticide susceptibility especially in their sensitiveness to DDT as compared with those of Japan. The former strains showed significantly higher percentage of brachypterous form than Japan strains under the laboratory rearing condition
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| Format: | biblioteca |
| Published: |
Taiwan (Taiwan)
1979
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| Subjects: | PLAGUICIDAS, RESISTENCIA A LOS PLAGUICIDAS, ARROZ, INSECTOS DANINOS, NILAPARVATA LUGENS, SOGATELA FURCIFERA, SOGATELA, JAPON, |
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