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| Toxicity Test and Field Control of Avermectin+Beta-cypermethrin against Plutella xylostella |
| Xu Xiaolong; Gu Zhongyan; Han Lijuan |
| Inst itute of Plant Protection; Jiangsu Academy of Agricultural Science; Nanjing 2100 14 |
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Abstract Toxicity test and field control of Avermectin + Beta- cypermethrin against Plutella xylostella were conducted. The results i ndicated that this compound pesticide showed high level activity to P.xylostella， the LC_(50) was 0.59mg·L~(-1) and cotoxicity c oefficient was 142.14. In pot test，the control efficiency was over 85% and residual activity lasted 10 days at concentration of 5mg·L~(-1) . In the field，the control efficiency was about 95% and residual activi ty lasted 10-15 days as this pesticide was dil...
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Received: 08 August 2000
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