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中文摘要：
为了明确小菜蛾对唑虫酰胺的抗性风险,为唑虫酰胺的合理应用提供理论依据,在室内用唑虫酰胺对小菜蛾进行抗性选育,并应用域性状分析法,研究了小菜蛾对唑虫酰胺的抗性现实遗传力（h2）和抗性发展速率。结果表明,连续筛选前13代（F0～F13）,小菜蛾对唑虫酰胺的抗性现实遗传力为0.124 9;停止筛选2代后,再连续筛选11代（F16～F26）,抗性现实遗传力为0.183 4;整个26代筛选期间,现实遗传力为0.167 2。当h2=0.167 2时,在致死率为50%～90%的选择压力下,预计小菜蛾对唑虫酰胺的抗性增长10倍需要15.0～6.8代,表明小菜蛾对唑虫酰胺产生抗性的风险较大。
英文摘要：
To evaluate the resistance risk of diamondback moth （Plutella xylostella） to tolfenpyrad and to provide positive guidance for scientific application of tolfenpyrad, P. xylostella were selected in the laboratory for resistance to tolfenpyrad. The realized resistance heritability and generations holding a lO-time increase in LCso were evaluated based on the Tabashnik＇ s method （threshold trait analysis）. The realized resistance heritability （h2） was 0. 124 9 for F0-F13 and 0. 184 3 for F16-F26, during which there were a total of 2 generations without selection. The realized resistance heritability for the entire selection period was 0. 167 2, according to which it would take 15.0- 6. 8 generations for P. xylostella to de- velop 10-time resistance to tolfenpyrad under selection pressure of 50% -90% mortality for each generation. These results indicated that P. xylostella may have significant resistance risk to tolfenpyrad.
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