19种杀虫剂及其混用对一品红烟粉虱的防治效果

The Control of 19 Insecticides and Their Mixtures to the Adults of Bemisia tabaci of Euphorbia pulcherrima

[目的]筛选对一品红烟粉虱安全有效的杀虫剂。[方法]采用盆栽试验的方法,测试19种杀虫剂对一品红烟粉虱的防治效果及对一品红的敏感性,哒螨灵、乐果与多种杀虫剂田间混用防治效果。[结果]盆栽试验结果表明:15%哒螨灵EC 100 mg a.i./L和40%乐果EC 400 mg a.i./L时对烟粉虱有良好的防治效果,药后3 d的校正防效达到79%以上,药后7 d超过70%。混用试验结果表明:乐果+哒螨灵及哒螨灵+辛硫磷对烟粉虱成虫有较好的防治效果。敏感性试验结果表明,辛硫磷对一品红有明显药害。[结论]哒螨灵、乐果及其混配可作为一品红烟粉虱防治的有效药剂,辛硫磷不适宜用于一品红。

[Aims] The paper aims to select safe and effective insecticides to control the Bemisia tabaci of Euphorbia pulcherrima. [Methods] The control effects of 19 insecticides to the B. tabaci and susceptibility to E. pulcherrima were conducted by field trials, the mixture of dimethoate, pyridaben with the other insecticides were also tested. [Results] The result showed that pyridaben 15% EC treated with 100 mg/L and dimethoate 40% EC treated with 400 mg/L had comparatively satisfied effect, and the corrected control effect was more than 79% after 3 d and more than 70% after 7 d. The mixture of dimethoate and pyridaben, pyridaben and phoxim had the best control effect against the adults of B. tabaci. The sensitive of 19 insecticides to the E. pulcherrima showed that phoxim causes significant crop injury. [Conclusions] Dimethoate, pyridaben and their mixtures could be used to control effectively B. tabaci, and phoxim is not suitable for controllin E. pulcherrima.