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苯甲酰基脲类和肼类昆虫生长调节剂对棉铃虫的生物活性
引用本文:戴芬,吴声敢,王强,赵学平,吴长兴.苯甲酰基脲类和肼类昆虫生长调节剂对棉铃虫的生物活性[J].浙江农业学报,2000,12(6):363-367.
作者姓名:戴芬  吴声敢  王强  赵学平  吴长兴
作者单位:浙江省农业科学院植物保护研究所,浙江 杭州 310021
基金项目:国家人事部留学回国人员资助项目。
摘    要:研究了作用机制完全不同的苯甲酰基脲类(氟铃脲)和双苯甲酰基肼类(抑食肼和虫酰肼)昆虫生长调节剂(IGR)及其混用对棉铃虫的生物活性和作用方式。供试3龄幼虫经氟铃脲点滴处理后,逐渐表现活动缓慢、反应迟钝、取食减少,最终死亡。死亡幼虫体壁薄而易破,头部背面呈现明显突起的白色透明水泡状(易破体并有体液流出),部分虫体黑化,表现明显的蜕皮障碍。3龄幼虫经抑食肼处理后,最先也表现为行为迟缓、食量减小,最终死亡的幼虫虫体缩小并发黑,部分存活的幼虫2d后即蜕皮。氟铃脲与抑食肼混合处理后,部分试虫呈现氟铃脲的中毒症状,部分试虫则表现抑食肼中毒症状,少量个体两种症状并发。氟铃脲对棉铃虫3幼虫的LD50值(点滴法)和1龄幼虫的LC50值(叶片法)分别为0.7434μga.i./头和2.0592mg/L,表现出很强的触杀作用和胃毒作

关 键 词:昆虫生长调节剂  苯甲酰基脲类  棉铃虫  增效作用
文章编号:1004-1524(2000)06-0363-05
修稿时间:2000年8月2日

Activity of two groups of insect growth regulators,IGRs to cotton bollworm Helicoverpa armigera
DAI Fen,WU Sheng-gan,WANG Qiang,ZHAO Xue-ping,WU Chang-xing.Activity of two groups of insect growth regulators,IGRs to cotton bollworm Helicoverpa armigera[J].Acta Agriculturae Zhejiangensis,2000,12(6):363-367.
Authors:DAI Fen  WU Sheng-gan  WANG Qiang  ZHAO Xue-ping  WU Chang-xing
Abstract:Symptom,toxicity and mode of action of insect growth regulators (IGRs), hexaflumuron,tebufenozide and RH5849, to cotton bollworm, Helicoverpa armigera (Hubner) were observed and assessed. After treated topically by hexaflumuron,the 3-instar larvae tend to move slowly with little sensitivity to a stimulate,fed on litter food an eventually die with the thin integument and a white transparent prominence on head. Some dead larvae become black and show failure of molt. The 3-instar larvae treated by RH5349 are also inactive in moving and feeding,dead larvae are in black and shrunken bodies,and living larvae abnormally molt in advance. After treated by the mixture of two chemicals, some larvae show the poisoning symptom of hexaflumuron, others are the symptom of RH5849, whereas a few larvae show mixed symptom. Hexaflumuron has a high contact toxicity to cotton bollworm, with 0.7434 μg a.i./larva of LD50 in topical application test, and a high stomach toxicity with 2.0592 mg/L of LC50 in leaf dipping bioassay. Tebufenozide is also stomach poisoning with 25.2576 mg/L of LD50, but RH5849 has little contact poison with more than 39.3633μg a. i./larva of LC50. In the mixture with different ratios , hexaflumuron and tebufenzide are independent in action to the bollworm except the ratio of hex aflumuron 1 mg/L and tebufenozid 5 mg/L that tends to be synergistic.
Keywords:insect growth regulator (IGR)  benzoylurea  benzoglhydrazine cotton bollworm  symptom  contact poisoning  stomach toxicity  mixture
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