摘要
采用浸泡幼果法测定了6种杀虫剂及其两元复配组合对梨小食心虫初孵幼虫的毒力,并将筛选出的增效组合在田间进行防效验证。结果表明,阿维菌素、氯虫苯甲酰胺、高效氯氟氰菊酯、呋虫胺、噻虫嗪和溴氰虫酰胺对梨小食心虫初孵幼虫的致死中浓度(LC50)分别为:0.691、4.883、5.350、10.326、13.966和27.942 mg/L。两元复配组合中,阿维菌素与呋虫胺复配组合(8∶1、2∶1、1∶1、1∶2和1∶4)、呋虫胺与氯虫苯甲酰胺复配组合(1∶4、1∶2、1∶1、2∶1和4∶1)、阿维菌素与氯虫苯甲酰胺复配组合(4∶1、1∶1和1∶4)和高效氯氟氰菊酯与呋虫胺复配组合(1∶4)具有增效作用。在梨小食心虫暴发为害年份、于梨果不同发育阶段进行田间防效验证,阿维菌素与呋虫胺1∶4(12.5 mg/kg+50 mg/kg)、呋虫胺与氯虫苯甲酰胺2∶1(25 mg/kg+12.5 mg/kg)和阿维菌素与氯虫苯甲酰胺1∶1(12.5 mg/kg+12.5 mg/kg)对梨小食心虫的防效分别为75.02%~94.81%、50.04%~89.15%和42.90%~90.57%,其中,阿维菌素与呋虫胺(1∶4)的防治效果最好。
Toxicity of six insecticides and their mixtures to the neonate larvae of Grapholitha molesta was tested using fruitlets dipping method,and the efficacy of synergistic mixtures was evaluated in pear orchard.The results showed that the LC50 values of abamectin,chlorantraniliprole,lambda-cyhalothrin,dinotefuran,thiamethoxam and cyantraniliprole were 0.691,4.883,5.350,10.326,13.966 mg/L and 27.942 mg/L,respectively.The mixtures of abamectin and dinotefuran at the ratios of 8∶1,2∶1,1∶1,1∶2 and 1∶4,dinotefuran and chlorantraniliprole at the ratios of 1∶4,1∶2,1∶1,2∶1 and 4∶1,abamectin and chlorantraniliprole at the ratios of 4∶1,1∶1 and 1∶4,lambda-cyhalothrin and dinotefuran at the ratio of 1∶4 showed significant synergism.Field test showed that the mixtures of abamectin and dinotefuran 1∶4(12.5 mg/kg+50 mg/kg),dinotefuran and chlorantraniliprole 2∶1(20.5 mg/kg+12.5 mg/kg)and abamectin and chlorantraniliprole 1∶1(12.5 mg/kg+12.5 mg/kg)could be used in controlling Grapholitha molesta at different development stages in pear orchard in seriously occurred year.Among them,abamectin&dinotefuran(1∶4)had the best control effect against G.molesta.
作者
庾琴
杜恩强
郭晓君
封云涛
张润祥
YU Qin;DU Enqiang;GUO Xiaojun;FENG Yuntao;ZHANG Runxiang(College of Plant Protection, Shanxi Agricultural University (Institute of Plant Protection), Taiyuan 030031, China)
出处
《植物保护》
CAS
CSCD
北大核心
2020年第5期265-269,共5页
Plant Protection
基金
国家重点研发计划(2016YFD0200505)
山西省重点研发计划(201803D221015-2)
山西省农科院特色农业技术攻关(YGG17109)。
关键词
梨小食心虫
初孵幼虫
复配
毒力
防效
Grapholitha molesta
neonate larvae
mixed insecticide
toxicity
control effect
