五种药剂打孔滴注法防治文旦吹绵蚧的效果

Control effects of five pesticides against Icerya purchasi Maskell on Citrus grandis( L.) Osbeck by trunk injection

吹绵蚧Icerya purchasi Maskell是萧山地区文旦Citrus grandis(L.)Osbeck等芸香科植物的主要害虫。选用48%毒死蜱乳油(EC)、4.5%高效氯氰菊酯EC、28%噻嗪·杀扑磷EC、10%吡虫啉可湿性粉剂(WP)和24%螺虫乙脂水悬剂(SC)5种药剂进行打孔滴注防治文旦吹绵蚧的药效比较试验。结果表明,28%噻嗪·杀扑磷EC防治效果最佳,校正虫口减退率为80.1%,24%螺虫乙脂SC次之,校正虫口减退率为79.5%,这2种药剂防效显著高于其他药剂。从经济效益考虑,建议在生产上使用28%噻嗪·杀扑磷EC。

lcerya purchasi Maskell was one of the important pests attacking Citrus grandis （ L. ） Osbeck in Xiaoshan district, Hangzhou in China. Chlorpyrifos 48% EC ,beta-cypermethrin 4.5% ,buprofezin 8% ＋ methidathion20% EC,imidacloprid 10% WP, and spirotetramat 24% EC were selected to control I, purchase on C. grandis plants by trunk injection in the field. The results showed that the control effect of buprofezin 8% ＋ methidathion 20% EC was the best, and corrected decline rate of L purchase was 80. 1% ;whereas the data for spirotetramat 24% EC was 76%. Additionally, the control effects of the above two agents were significantly higher than that of the others. Buprofezin 8 % ＋ methidathion 20% EC was suggested according to the consideration of economic benefits.