21.2%春雷霉素·氯苯酞WP对水稻稻瘟病的防治研究

Control Effect of 21.2% of Kasugamycin+Phthalide Wettable Powder against Rice Blast

对21.2%春雷霉素·氯苯酞WP防治稻瘟病((Pyricularia oryzae)的田间效果进行了试验。结果表明:该药剂对稻瘟病有较好的防治效果,有效成分用量为238.5、310、381.6g/hm2时,对水稻叶瘟的防效分别为64.35%、70.91%、76.04%;对穗瘟的防效分别为62.04%、68.95%、74.51%;与空白对照相比其增产率分别为9.33%、16.20%、20.47%。

The control effect of 21.2% of kasugamycin＋phthalide wettable powder（WP） against rice blast was studied through field experiments.The results showed that this pesticide has great control effect against rice blast,when applying amount of effective ingredient was 238.5 g/hm2,310 g/hm2 and 381.6 g/hm2,the control effect against rice leaf blast was 64.35%,70.91% and 76.04%,respectively;the control effect against rice panicle blast was 62.04%,68.95% and 74.51%,respectively;in contrast to the blank control group,its increasing rate of yield was 9.33%,16.20% and 20.47%,respectively.