敌敌畏毒土防治鼠妇的室内毒力试验

目的]测定敌敌畏毒土防治鼠妇的毒力效果。方法]将80%的敌敌畏乳油按100、200、400、800和1 000倍五个配比配成毒土,测定其室内对普通球鼠妇的杀虫效果,利用SPSS统计分析出其LC50值。结果]室内实验表明,随敌敌畏毒土配比的增高,即随敌敌畏乳油含量的下降,普通球鼠妇的平均死亡率明显降低,毒土配比为100倍,试虫平均死亡率为98.9%;毒土配比为200倍、400倍、800和1 000倍时,试虫平均死亡率为81.1%、73.3%、40.0%、33.3%。结论]通过不同毒土配比的差异比较,表明400×毒土比较适合生产应用,80%敌敌畏乳油毒土配比的LC50为642.10倍。关键词毒力效果;敌敌畏毒土;鼠妇;防治

Indoor Toxicity Effect of Dichlorvos poisonous Soil Control Pillbug

Toxicity effect of dichlorvos poisonous soil on pillbug was determined.Poisonous soils with 5 matchings were made by mixing soil and 80% dichlorvos EC diluted at 100,200,400,800 and 1 000 times.Their indoor toxicity effect on Armadillidium vulgare was determined and LC50 of dichlorvos poisonous soil was calculated by SPSS software.Indoor experimental result showed that the mortality of A.vulgare was obviously reduced with decreasing of dichlorvos content in the poisonous soils.The mortality of A.vulgare was 98.9% when dichlorvos diluted at 100 times.The mortalities of the tested pest were 81.1%,73.7%,40.0% and 33.3% resp.when the dichlorvos was diluted at 200,400,800 and 1 000 times.The variance analysis on poisonous soils different matching showed that the poisonous soil with dichlorvos diluted at 400 times was more suitable to be applied in production and LC50 of 80% dichlorvos in the poisonous soil was diluted at 642.10 times by SPSS calculation.