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Correlation of catalase and peroxidase with pesticide tolerance in massonpine caterpillar
Author(s): 
Pages: 9-14
Year: Issue:  1
Journal: ACTA ENTOMOLOGICA SINICA

Keyword:  马尾松毛虫耐药性过氧化氢酶过氧化物酶醚菊酯;
Abstract: 马尾松毛虫Dendrolimus punctatus幼虫体内存在着过氧化氢酶(CAT)和过氧化物酶(POD).4龄幼虫的CAT和POD活力较大,其次是6龄幼虫,5龄幼虫的CAT和POD活力较4龄和6龄幼虫低.醚菊酯(etofenprox)处理后,在兴奋期(30 min),CAT和POD活力水平上升.4龄和6龄幼虫在抑制期(50 min以后),CAT和POD活力呈波动式上升,接近死亡时下降.5龄幼虫的CAT和POD活力呈波动式上升,接近死亡时下降.5龄幼虫的CAT在抑制期保持比正常虫体高的活力.结果表明,马尾松毛虫4龄、5龄和6龄幼虫与耐药性存在一定的相关性,研制酶的抑制剂具有实用意义.根据毒力测定结果,马尾松毛虫幼虫对醚菊酯的耐药力,5龄是4龄的1.43倍,6龄是4龄的1.72倍.因此,药物防治的合理时期应掌握在4龄以前较适宜.
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