侧柏叶枯病防治药剂的筛选

Screening of Control Agents for Platycladus orientalis Leaf Blight

侧柏叶枯病是一种危害程度高、传染性强的侵染性病害,为探寻临汾市乡宁县侧柏叶枯病防治的最佳药剂及时间,对比分析了70%代森联水分散剂、40%百菌清悬浮剂、250 g/L嘧菌酯悬浮剂、50%退菌特悬浮剂4种常见药剂不同浓度对侧柏叶枯病的防治效果。结果表明:4种药剂对侧柏叶枯病均具备一定的防治效果,其防治效果可以达到63.82%~95.93%。在6月中村侧柏叶枯病大量发生期,使用250 g/L嘧菌酯悬浮剂1000~2000倍液或者70%代森联水分散剂1000倍液,每14 d喷施1次,共喷施2次,即可有效控制侧柏叶枯病的蔓延。

Platycladus orientalis leaf blight is an infectious disease with high degree of harm and strong infectivity.In order to find out the best drug and control time for the control of Platycladus orientalis leaf blight in Xiangning County,Linfen City,the control effects of four common agents,70%Daisenlian water dispersant,40%chlorothalonil suspension agent,250 g/L azoxystrobin suspension agent as well as 50%fungicide suspension agent,and different concentrations on Platycladus orientalis leaf blight are compared.The results showed that the four chemicals had certain control effects on the Platycladus orientalis leaf blight,and the control effect could reach 63.82%~95.93%.In the middle of June,when a large number of Platycladus orientalis leaf blight occurs in the village,the spread of Platycladus orientalis leaf blight can be effectively controlled by using 250 g/L Azoxystrobin suspension agent 1000~2000 times or 70%Daisenlian water dispersant 1000 times,spraying once every 14 days,a total of two times.