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| Studies on the Susceptibility of Guangzhou Diamondback Moth to Bacillus thuringiensis and Abamectin |
| Liu Honghai; Huang Zhangxin |
| Laboratory of Insect Toxicology; South China Agricultural University; Guangzhou 510642 |
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Abstract Insecticide resistance of Guangzhou detected by the leaf residue bioassay showed that the resistance ratios were 1.44～3.82 folds to different Bt formulations;The resistance ratios of the 3rd and 4th instar larvae were 2.39 and 2.86 folds to Abamectin at LC 50 ,and were 4.24 and 7.11 folds at LC 95 . It was noticed that the slopes of LD P line from the Guangzhou Diamondback Moth population were less than that of LD P line from standard susceptible population. This suggests that the resistance of Gu...
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Received: 01 January 1900
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