Influences of insecticides on toxicity and cuticular penetration of abamectin in Helicoverpa armigera

作     者：QIANGWANG JIA-ANCHENG ZHONG-MINLIU SHENG-GANWU XUE-PINGZHAO CHANG-XINGWU 

作者机构：InstituteofAppliedEntomologyZhejiangUniversityChina//InstituteforQualityandStandardofAgriculturalProductsZhejiangAcademyofAgriculturalSciencesChina//ZhejiangKeyLabofFoodSafetyHangzhouChina InstituteofAppliedEntomologyZhejiangUniversityChina CentreforHorticultureandPlantSciencesUniversityofWesternsydneyFlawkesburyRichmondNewSouthWalesAustralia InstituteforQualityandStandardofAgriculturalProductsZhejiangAcademyofAgriculturalSciencesChina InstituteforQualityandStandardofAgriculturalProductsZhejiangAcademyofAgriculturalSciencesChina//ZhejiangKeyLabofFoodSafetyHangzhouChina 

出 版 物：《Insect Science》 (昆虫科学（英文版）)

年 卷 期：2005年第12卷第2期

页      面：109-119页

核心收录：

学科分类：0710[理学-生物学] 090403[农学-农药学(可授农学、理学学位）] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 09[农学] 0904[农学-植物保护] 0901[农学-作物学] 0713[理学-生态学] 

主　　题：杀虫剂 混用剂 增效剂 毒性 表皮渗透能力 Helicoverpa armigera abamectin 

摘      要：Synergistic actions for mixtures of abamectin with other insecticides in some insect pests were evaluated, and the possible synergistic mechanism was studied by the comparison in toxicity and cuticular penetration of abamectin between with and without other insecticides or synergists in Helicoverpa armigera larvae. The results of bioassay showed that horticultural mineral oil (HMO), hexaflumuron, chlorpyrifos, and some other insecticides were synergistic to abamectin with 152.0-420.0 of co-toxicity coefficient(CTC) in some agricultural insect pests. In topical application tests, HMO or piperonyl butoxide (PBO) increased the toxicity of abamectin in larvae of H. armigera, but the mortality was not affected by s,s,s-tributylphorotrithioate (DEF) and triphenylphosphate (TPP). The synergistic action of HMO was obviously higher than PBO, and when treated simultaneously with abamectin, HMO gave a more significant synergism than if treated 2 hours ahead. The highest synergistic effect (SE) was found in the mixture of ‘abamectin+HMO (1:206) . The mortality did not increase or the toxicity drop, when a synergist or HMO was added into the mixture of ‘abamectin+HMO or ‘abamectin+synergist , respectively. Results from the isotope tracing experiments showed that HMO significantly enhanced the penetration of ^3H-abamectin through the cuticle of H.armigera larvae, which resulted in the synergism of the mixture. The cuticular penetration of ^3H-abamectin was not accumulatively affected by chlorpyrifos, nor by hexaflumuron,though there was an inhibition within 30 seconds or 1 hour after treated by these two chemicals respectively. Results suggested that the synergism of abamectin mixed with hexaflumuron or chlorpyrifos might be related to inhibition of metabolic enzymes or target sites in the larvae.