【摘要】 本文采用室内与田间试验相结合的方法,研究了50％毒·氯乳油对韭菜迟眼蕈蚊幼虫的杀虫效果。结果表明其对韭菜迟眼蕈蚊幼虫具有良好的杀虫效果,室内毒力测定LC50= 44．42mg／L;田间防治效果理想,且表现出良好的速效性及持效性,其中3 000g／hm2剂量, 药后3d的防治效果达到79．26％,药后20d防治效果仍然可以维持在80％以上。更多还原

【Abstract】 Insecticidal efficacy of chlorpyrifos · cypermethrin 50% EC to Bradysia odoriphaga was studied in laboratory and field. The results showed that it was a good insecticide for controlling Bradysia odoriphaga. The value of LC50 was 44.42mg/L. The control effect in field was perfect. The control effect was 79.26% with the dosage of 3 000g/hm2 after 3 days, and the efficacy could remain upwards 80% after 20 days.更多还原