5种杀虫剂对温室番茄烟粉虱的药效试验

Efficacy Test of Five Insecticides against Bemisia tabaci(Gennadius)in Greenhouse Tomato

烟粉虱为刺吸性害虫,其繁殖能力强、种群数量庞大,群聚为害,叠代发生,在北京温室严重为害番茄。为此,选用5种杀虫剂对温室番茄烟粉虱开展田间药效试验。试验结果表明,各处理在药后1、3、7 d的校正防效分别为55.41%~74.94%、73.63%~90.28%、84.12%~96.03%,有逐步提升的趋势,说明各处理药剂的持效性与稳定性未衰减。药后7 d,5种杀虫剂均表现出良好的防效,其中,22%螺虫·噻虫啉悬浮剂和20%呋虫胺可溶性粉剂的防效最好,分别为96.03%和91.96%,显著高于其他处理。

Bemisia tabaci(Gennadius)is a piercing-sucking pest.It has strong reproductive ability,large population size,clustering damage,and overlapping generations.It seriously damages tomatoes in greenhouses in Beijing.Therefore,five insecticides were selected to carry out field efficacy trials on greenhouse tomato B.tabaci(Gennadius).The results showed that the corrected control effects of each treatment were 55.41%-74.94%,73.63%-90.28%and 84.12%-96.03%at 1,3,and 7 days after treatment,respectively,with a gradually increasing trend,indicating that the persistence and stability of each treatment did not decay.After 7 days of treatment,the five insecticides showed good control effects.Among them,22%spirulina·thiacloprid SC and 20%dinofuran SP had the best control effects,which were 96.03%and 91.96%,respectively,significantly higher than other treatments.