2.5%高效氟氯氰菊酯微乳剂对苹果桃小食心虫的田间应用技术研究

田间应用及安全性评价结果表明,2.5%高效氟氯氰菊酯微乳剂稀释2000～4000倍防治苹果树桃小食心虫Carposina niponensis Walsingham,药后5d各地防效分别为78.14%～99.57%、87.50%～96.58%、80.73%～96.20%,药后10d各地防效分别为84.49%～98.60%、77.78%～94.44%、80.66%～99.29%,药后15d各地防效分别为83.35%～100%、77.55%～98.90%、88.89%～96.58%。2.5%高效氟氯氰菊酯微乳剂稀释2000～3000倍处理与对照药剂2.5%高效氟氯氰菊酯乳油3000倍处理防效相当。最佳用药量以2000～3000倍为宜,施药适期为苹果果实膨大期,且桃小食心虫卵孵化盛末期,虫果率达1%时,用药后5～10d可有效控制虫害,持效期较长。药后苹果树未见异常。

Field application of 2.5% beta-cyfluthrin micro-emulsion to peach fruit moth Carposina niponensis,in apple

The field application and safety evaluation results showed that the effects of 2.5% beta-cyfluthrin micro-emulsion in the dilution of 2000-4000 times to peach fruit moth,Carposina niponensis Walsingham,on apple trees in 3 different regions were 78.14%-99.57%,87.50%-96.58% and 80.73%-96.20% after 5 d,55.7-99.01%,77.78%-94.44% and 80.66%～99.29% after 10 d,77.55%-100%,77.55%-98.90% and 88.89%-96.58% after 15 d.The effect of 2.5% beta-cyfluthrin micro-emulsion in the dilution of 2000-3000 times was same as the control pesticide.So,the best dose was 2000-3000 times dilution and the appropriate period for spraying was enlargement period of apple fruit when it was the late stage of egg hatching of the pest.When rate of wormed fruit reached 1%,it would effectively control the pest after 5-10 d sprayin and get longer durability.There was no influence to growth of apple trees.