50%稻丰散EC防治水稻灰飞虱田间药效试验

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田间试验表明,50%稻丰散EC对水稻2代灰飞虱具有良好的控制效果,商品用量1 500 ml/hm^2,药后13、、7 d对灰飞虱若虫的校正防效在85.7%~99.7%,其速效性效果与毒死蜱相当,持效性效果好于噻嗪酮。
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