8种杀虫剂对槟榔红脉穗螟的毒力测定及混配比例的筛选  

Bioassay of 8 Insecticides Against Tirathaba rufivena and Synergy Test of Different Mixtures of the Two Best Ones

作　　者：潘润东 刘向蕊 李培征 PAN Rundong;LIU Xiangrui;LI Peizheng(College of Plant Protection,Hainan University,Haikou 570228,China)

机构地区：[1]海南大学植物保护学院,海口570228

出　　处：《植物医生》2021年第4期31-35,共5页Plant Doctor

基　　金：海南省重大科技项目(ZDKJ201817-23).

摘　　要：筛选能有效防治为害槟榔的红脉穗螟(Tirathaba rufivena)的药剂并明确其混配比例,对实现害虫防治中农药减施增效,降低田间农药残留和延缓害虫抗药性有重要意义,在室内测定了8种药剂(甲氨基阿维菌素苯甲酸盐、氯虫苯甲酰胺、高效氯氰菊酯、茚虫威、杀虫单、噻虫胺、甲基嘧啶磷和吡虫啉)对红脉穗螟二龄幼虫的毒力.试验结果看出,效果最好的两种药剂是甲氨基阿维菌素苯甲酸盐(LC_(50)值为0.54 mg/L)和氯虫苯甲酰胺(LC_(50)值为1.34 mg/L),基于此,对这两种药剂进行了混配,测定了联合毒力并筛选了合适的配比.结果表明,甲氨基阿维菌素苯甲酸盐和氯虫苯甲酰胺在不同的混配比例下表现出相加或增效作用,其中以质量比1∶3混配时的增效作用最为显著,LC_(50)值为0.70 mg/L,共毒系数CTC为139.68.研究结果可为在槟榔上开展红脉穗螟的化学防治提供参考.Tirathaba rufivena is a serious pest on Areca catechu.This study aims to evaluate effective insecticides and synergy effect of the best mixture for controlling this pest.It is important to reduce the application and increase the efficiency of insecticides,reduce insecticide residue,and delay the development pf drug resistancein the pest.In an experiment reported herein,the toxicities of 8 insecticides(emamectin benzoate,chlorantraniliprole,beta cypermethrin,indoxacarb,monosultap,thiamethoxam,pirimiphos-methyl and imidacloprid)against the T.rufivena were tested through bioassay.The results showed that emamectin benzoate(LC_(50):0.54mg/L)and chlorantraniliprole(LC_(50):1.34 mg/L)were the best choices.Then,the synergy effect of different mixtures of the two was tested.Emamectin benzoate and chlorantraniliprole showed additive or synergistic effects at different mixing ratios,and the mixture with a mass ratio of 1∶3 had the most significant synergistic effect.Its LC_(50) was 0.70 mg/L,and CTC was 139.68,which could be used as the best formula.

关 键 词：甲氨基阿维菌素苯甲酸盐 氯虫苯甲酰胺 红脉穗螟 生物测定 

分 类 号：S433.4[农业科学—农业昆虫与害虫防治]