Effects of AOS on Bt's Adhesion Amount on Vegetable Leaves and Its Insecticidal Effect  

作　　者：Airan CHEN Yinghao MA Dayong JIN 

机构地区：[1]College of Agriculture, Yanbian University

出　　处：《Agricultural Biotechnology》2019年第2期235-237,共3页农业生物技术（英文版）

基　　金：Supported by the Cooperative Project Between the People's Republic of China and the Republic of Korea(413090094)

摘　　要：[Objectives] This study was conducted to investigate the safety of surfactants AOS and Tween 80 on Bt and their effects on Bt's adhesion amount on crop leaves and its field efficacy. [Methods] Certain concentrations of AOS and Tween 80 were added to Bt liquid to check the effects of the surfactants on Bt spore germination, the adhesion amount of Bt on vegetable leaves and the field efficacy on beet armyworm. [Results] After treatment with surfactants AOS and Tween 80, Bt spores germinated normally. After adding AOS, the adhesion amounts of Bt spores on scallion, kohlrabi, radish and Chinese cabbage leaves were 209.75, 249.00, 274.00 and 281.75, respectively, which was 3.8, 2.2, 2.0 and 1.6 times higher than the CK. After adding Tween 80, the adhesion amounts of Bt spores on scallion, kohlrabi, radish and Chinese cabbage leaves were 198.25, 203.25, 233.00 and 236.75, respectively, which were 3.6, 1.8, 1.7 and 1.4 times higher than the CK, respectively. The average field insecticidal effect of the Bt liquid reached 81.3% and 79.5% after the addition of surfactants AOS and Tween 80, respectively, while the average insecticidal effect of the CK without the addition of a surfactant was only 53.3%, which was remarkably lower than above two values. [Conclusions] Surfactants AOS and Tween 80 are safe for Bt; and the addition of surfactants AOS and Tween 80 significantly increased the amount of Bt attached to vegetable leaves, and significantly improved the control efficacy of pests on plants rich in cuticle.[Objectives] This study was conducted to investigate the safety of surfactants AOS and Tween 80 on Bt and their effects on Bt's adhesion amount on crop leaves and its field efficacy. [Methods] Certain concentrations of AOS and Tween 80 were added to Bt liquid to check the effects of the surfactants on Bt spore germination, the adhesion amount of Bt on vegetable leaves and the field efficacy on beet armyworm. [Results] After treatment with surfactants AOS and Tween 80, Bt spores germinated normally. After adding AOS, the adhesion amounts of Bt spores on scallion, kohlrabi, radish and Chinese cabbage leaves were 209.75, 249.00, 274.00 and 281.75, respectively, which was 3.8, 2.2, 2.0 and 1.6 times higher than the CK. After adding Tween 80, the adhesion amounts of Bt spores on scallion, kohlrabi, radish and Chinese cabbage leaves were 198.25, 203.25, 233.00 and 236.75, respectively, which were 3.6, 1.8, 1.7 and 1.4 times higher than the CK, respectively. The average field insecticidal effect of the Bt liquid reached 81.3% and 79.5% after the addition of surfactants AOS and Tween 80, respectively, while the average insecticidal effect of the CK without the addition of a surfactant was only 53.3%, which was remarkably lower than above two values. [Conclusions] Surfactants AOS and Tween 80 are safe for Bt; and the addition of surfactants AOS and Tween 80 significantly increased the amount of Bt attached to vegetable leaves, and significantly improved the control efficacy of pests on plants rich in cuticle.

关 键 词：Bacillus THURINGIENSIS Surfactant Alpha OLEFINE SULFONATE ADHESION AMOUNT Control efficacy 

分 类 号：S436.3[农业科学—农业昆虫与害虫防治]