本文通过对设施黄瓜上发生的烟粉虱进行药剂使用浓度对比试验,旨在选出容量少、效果好、残留量低的药剂。结果表明:70%吡虫啉浓度越高效果越好,且施用安全;0.3%印楝素浓度越高,效果越不明显,应以合适浓度施用为宜;2.5%鱼藤酮各浓度之间差异不明显,有待再次做浓度试验进行验证。 In this paper, cucumber on facilities cucumber whitefly occurred drug use concentration contrast test aimed at selecting less capacity, good effect, low residue of the agent. The results showed that: the higher the concentration of 70% imidacloprid was, the better the safe application was. The higher the concentration of 0.3% azadirachtin was, the less obvious the effect was. Appropriate concentrations should be applied. No significant difference was found between 2.5% To be done again concentration test validation.