不同药剂防治水稻灰飞虱及条纹叶梧病的研究

目的]比较市场上可同时控制灰飞虱和水稻条纹叶枯病的不同药剂的防效,并检验其对水稻的安全性,为选用适宜的药剂提供参考。方法]以清水为对照,进行了25%吡蚜酮.噻虫嗪悬浮剂及其与毒氟磷混配剂、吡蚜酮单剂等5种药剂对水稻灰飞虱及水稻条纹叶枯病的防效试验。结果]吡蚜酮.噻虫嗪及其与毒氟磷混配剂、吡蚜酮单剂对秧田灰飞虱成虫均具有较好的控制效果,在灰飞虱大发生年份,秧田第4次药后7 d防效均在75.00%以上;25%吡蚜酮.噻虫嗪悬浮剂及其与毒氟磷混配剂、吡蚜酮单剂对水稻条纹叶枯病防效也较好,大多在70.00%以上。结论]吡蚜酮.噻虫嗪及其与毒氟磷混配剂、吡蚜酮单剂对水稻灰飞虱及条纹叶枯病均具有较好的防效,可在水稻生产中推广应用。

Effect of the Different Pesticides on the Control of Smaller Brown Plant-hopper and Stripe-disease of Rice

Objective] The reference for the appropriate pharmaceutical use in the control of rice brown plant-hopper and stripe-disease was provided through the comparison of the controlling effect of those chemicals in market and the test of their security.Method] The experiment in the effect of 5 types of pesticides,including pymetrozine-thiamethoxam SC of 25% and its mixture with phosphate fluorid,pymetrozine and others,on rice brown plant-hopper and stripe disease was conducted based on the water being taken as CK.Result] The pymetrozine-thiamethoxam SC and its mixture with phosphate fluorid,pymetrozine had good control effect on the control of the brown plant-hopper adult and in the year of the brown plant-hopper's out-breaking,the controlling efficiency on rice brown plant-hopper on the 7th day after the 4th spraying of these chemicals in nursery was more than 75.00% and on stripe-disease,over 70.00%.Conclusion] The pesticides,such as 25% of pymetrozine-thiamethoxam SC and its mixture with phosphate fluorid,pymetrozine had better control effect on rice brown plant-hopper and stripe-disease,which could be extended and applied in rice production.