具保幼激素活性昆虫生长调节剂与昆虫摄食行为反应的关系(英文)

本文以烯虫酯、双氧威、ＮＣ－１７０、ＮＣ－１８４和ＮＣ－１９６等具保幼激素活性的昆虫生长调节剂（ＩＧＲｓ）为药剂，以丝绵木金星尺蠖 Ｃａｌｏｓｐｉｌｏｓ ｓｕｓｐｅｃｔａ４龄幼虫和亚洲玉米螟 Ｏｓｔｒｉｎｉａ　ｆｕｒｎａｃａｌｉｓ５龄幼虫为试材，采用点滴法和混药饲喂法，结合非选择性饲料柱称重法，研究了ＩＧＲｓ与昆虫摄食行为之间的关系。结果表明，烯虫酯、双氧威、ＮＣ－１７０、ＮＣ－１８４、ＮＣ－１９６和川楝素对亚洲玉米螟５龄幼虫的非选择性拒食率依次为－３７．７、１４．６、－１２．３、１０．９、１４．７和６２．２％，烯虫酯刺激两种试虫取食，而双氧威则有一定的拒食作用，不同药剂表现出的影响不尽一致。因此，外源具保幼激素活性的活性物质对昆虫摄食行为反应的干扰破坏，可能是ＩＧＲs作用机理中不可忽视的重要方面之一。对饲料柱称重法和虫粪称重法进行了比较，证实两种方法结果相近，趋势一致，均可用于昆虫摄食行为的生测。

THE RELATIONSHIP BETWEEN INSECT GROWTH REGULATORS WITH JUVENILE HORMONE ACTIVITY AND INSECT FEEDING BEHAVIOURAL RESPONSE

Five insect growth regulators (IGRs) with juvenile hormone (JH) activity including fenoxy- carb, methoprene, NC-170, NC-184 and NC-196 ware selected to study on the relationship between IGRs and feeding behaviour of the fourth instar larvae of Calospilos suspecta (Warren) and the fifth instar larvae of Ostrinia fureacalis Guenee, by topical and dietary applications as well as "diet column" methods. The results indicated that the antifeeding indices of methoprene, fenoxycarb, NC-170, NC-184, NC-196 and toosendanin against the fifth instar larvae of Ostrinia furnacalis in no-choice test were -37. 7, 14. 6, -12. 3, 10. 9, 14. 7 and 62. 2% respectively. Methoprene could stimulate the two species of insects to feed, where-as fenoxycarb had some antifeeding activity, and the effects of all the tested chemicals were different. Therefore, disturbances of IGRs with JH activity on insect feeding behavioural response may be one of the mechanisms of action not to be ignored. Moreover, by comparing "diet column" method with "faeces weight" method, it was suggested that the two methods might be applied in bioassay of antifeeding be- haviour.