【摘要】 每６６７平方米用２５％吡虫啉可湿性粉剂５～１０克，对小麦穗蚜的防治效果达９Ｏ％以上，持效期为１０～２０天。更多还原

【Abstract】 The result of field trial indicated that imidacloprid 25 WP was very effective against wheat ear aphid. At rate of 75￣150 g a. i. /ha,the control effect was over 90% and sustained for 10￣20 days.更多还原