摘要
为评价南方小花蝽对烟蚜的控制潜能,在25℃的条件下研究了南方小花蝽3龄若虫、4龄若虫、5龄若虫、雌成虫和雄成虫分别对烟蚜3龄若蚜、4龄若蚜和成蚜在烟草叶片上的捕食作用.结果表明:南方小花蝽不同龄期若虫与雌、雄成虫对不同虫龄及虫态烟蚜的捕食功能反应均符合Holling-II圆盘方程.南方小花蝽各虫态均对3龄若蚜的捕食量最大,对成蚜的捕食量最小.南方小花蝽雌成虫对3龄烟蚜的瞬时攻击率最高达0.5000,寻找效应最强为0.4766.研究表明南方小花蝽对烟蚜捕食量大,捕食能力强,是烟蚜的有效天敌.
To evaluate the predatory capacity of Orius similis to Myzus persicae,the functional response of O.similis(3~(rd)instar,4~(th)instar,5~(th)instar,female adult and male adult)to M.persicae(3~(rd)instar,4~(th)instar and adult)were studied at 25℃ with tobacco as host plant.The results show the functional responses of different stages of O.similis to M.persicae consist with Holling-II equations.All stageS of O.similis had the greatest predation on 3~(rd) instar of M.persicae,or while they had the lowest on adult of M.persicae.The female adult of O.similis had a highest instantaneous attack rate to 3~(rd) instar of M.persicae with 0.5000,and the searching efficiency was highest with 0.4766.The results indicate that O.similis had a higher predictive capacity on M.persicae,and it's an effective natural enemy.
引文
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