15种杀虫剂对红火蚁工蚁的触杀活性研究  

Studies on the Contact Toxicity of Insecticides Against the Worker Ants of Solenopsis invicta

作　　者：黄田福[1] 熊忠华[1] 曾鑫年[1] 

机构地区：[1]农药与化学生物学教育部重点实验室华南农业大学红火蚁研究中心,广东广州510642

出　　处：《华南农业大学学报》2007年第4期26-29,共4页Journal of South China Agricultural University

基　　金：广东省科技计划重大项目(2005A20401001);农业部项目(农财发[2005]16号);广东省红火蚁防控技术项目(粤农保[2005]26号)

摘　　要：室内采用药膜法研究了15种杀虫剂对红火蚁Solenopsis invicta工蚁的触杀毒力、瞬时接触毒杀和虫体接触传导毒杀活性.触杀毒力测定结果表明,红火蚁工蚁对杀虫剂较敏感,所试15种药剂中有14种杀虫剂处理24 h的LC50值低于10μg/mL,其中9种的LC50值低于0.1μg/mL,仅有阿维菌素的触杀毒力表现较弱,其处理48 h的LC50值为1 045.74μg/mL.瞬时接触毒杀活性研究结果表明:毒杀活性随药剂浓度的提高而上升,其中,辛硫磷在质量浓度50μg/mL以上时,10 s瞬时接触毒杀活性24 h后即可达100%;氟虫腈、灭多威和毒死蜱也具有良好的瞬时接触毒杀活性.虫体接触传导毒杀活性测定结果表明,辛硫磷和高效氯氟氰菊酯易于通过虫体传导,辛硫磷50μg/mL处理24 h后的传毒活性为93.33%,100μg/mL以上的传毒活性达100%.The contact toxicity,instant contact mortality and body contact mortality of 15 insecticides against worker ants of the red imported fire ant were measured under laboratory conditions.The contact toxicity showed that the worker ants were susceptible to most of the insecticides.Among the tested insecticides,the LC50 values of 14 insecticides were lower than 10 μg/mL after 24 h treatment,and those of 9 insecticides were lower than 0.1 μg/mL.The contact toxicity of abamectin was relative low with a LC50 value of 1 045.74μg/mL after 48 h treatment.Mortalities of workers ants for 10 s instant contact to insecticides exhibited positive dosage dependence.Phoxim caused 100% instant contact mortality to the worker ants at mass concentrations higher than 50 μg/mL after 24 h treatment.Fipronil,methomyl and chlorpirifos showed no significantly difference to phoxin in the instant contact test.The results of the body contact toxicity indicated that phoxin and lambda-cyhalothrin could be easily transferred through ant body.The body contact mortality of phoxin at mass concentration of 50 μg/mL after 24 h treatment was 93.33%,and reached 100% at mass concentration higher than 100 μg/mL.

关 键 词：红火蚁 化学防治 杀虫剂 触杀毒力 

分 类 号：S482.3[农业科学—农药学]