吡虫啉和噻虫嗪对苜蓿盲蝽的防治效果及其在苜蓿中的残留  

Control effects of imidacloprid and thiamethoxam on Adelphocoris lineolatus and their residues in alfalfa

作　　者：安静杰[1] 郭江龙 高占林[1] 袁文龙 党志红[1] 耿欣月 闫秀 李耀发[1] AN Jingjie;GUO Jianglong;GAO Zhanlin;YUAN Wenlong;DANG Zhihong;GENG Xinyue;YAN Xiu;LI Yaofa(Plant Protection Institute,Hebei Academy of Agricultural and Forestry Sciences,IPM Center of Hebei Province,Key Laboratory of Integrated Pest Management on Crops in Northern Region of North China,Ministry of Agriculture and Rural Affairs,Baoding 071000,China;Plant Protection and Quarantine Station of Hebei Province,Shijiazhuang 050011,China)

机构地区：[1]河北省农林科学院植物保护研究所,河北省农业有害生物综合防治工程技术研究中心,农业农村部华北北部作物有害生物综合治理重点实验室,保定071000 [2]河北省植保植检站,石家庄050011

出　　处：《植物保护》2023年第2期348-353,共6页Plant Protection

基　　金：公益性行业(农业)科研专项(201103012);国家重点研发计划(2017YFD0201906)。

摘　　要：为了评价新烟碱类杀虫剂吡虫啉和噻虫嗪对苜蓿盲蝽的防治效果及安全性,采用田间喷雾法测定了20%吡虫啉可溶液剂(SL)和30%噻虫嗪悬浮剂(SC)对苜蓿盲蝽的防治效果,使用超高效液相色谱-串联质谱法(UPLC-MS/MS)测定了施药1、2、3次后(间隔7 d),药剂在苜蓿中的残留情况。结果表明,当吡虫啉和噻虫嗪在施药剂量分别为25.02 g/hm^(2)和18.00 g/hm^(2)时,药后3~7 d对苜蓿盲蝽的防治效果分别为80.01%~82.01%和77.54%~83.29%。吡虫啉和噻虫嗪连续施药3次后,在苜蓿中的最终残留量分别为1.90 mg/kg和0.08 mg/kg,吡虫啉已超过我国食品安全国家标准GB 2763-2021规定的果蔬中的最大残留限量(0.5 mg/kg)。因此建议每茬苜蓿生长期,可选用吡虫啉和噻虫嗪防治苜蓿盲蝽,吡虫啉和噻虫嗪喷施次数分别不宜超过2次和3次。In order to evaluate the control effect and safety of neonicotinoid insecticides imidacloprid and thiamethoxam,the control efficacies of imidacloprid 20%SL and thiamethoxam 30%SC on Adelphocoris lineolatus were measured by spray method.After spraying once,twice and three times at seven days intervals,the final residues of imidacloprid and thiamethoxam in alfalfa were determined by liquid chromatography-tandem mass spectrometry(UPLC-MS/MS).Three to seven days after application,the efficacy of imidacloprid and thiamethoxam against A.lineolatus at application dosage of 25.02 g/hm^(2) and 18.00 g/hm^(2) were 80.01%-82.01%and 77.54%-83.29%,respectively.The final residues of imidacloprid and thiamethoxam in alfalfa were 1.90 mg/kg and 0.08 mg/kg,respectively,after three successive applications.The content of imidacloprid has exceeded the maximum residue limit(0.5 mg/kg)of fruits and vegetables in national food safety standard GB 2763-2021.Therefore,it is suggested that imidacloprid and thiamethoxam can be used to control mirid bugs,and their spraying times should not exceed two and three times,respectively,in each alfalfa growth period.

关 键 词：紫花苜蓿 新烟碱类杀虫剂 苜蓿盲蝽 防治效果 农药残留 

分 类 号：S435.4[农业科学—农业昆虫与害虫防治]