烟草赤星病发病规律及防治技术研究

[目的]研究烟草赤星病发病规律及防治技术.[方法]比较不同品种、不同施肥量、不同移栽期、不同药剂对赤星病的抗病、发病关系以及防治效果.[结果]中烟103抗性最强,中烟100、K326次之,云烟87、CF205最差.N、P、K比例以1.0∶1.2∶3.0或1.0∶1.5∶3.0为宜,氮肥用量一般施纯氮67.5～90.0 kg/hm2为宜.5月5～20日移栽是最适宜的种植时期.防治赤星病效果最好为40％菌核净可湿性粉剂,防效为53.44％.[结论]为烟草赤星病的防治提供参考.

Study on Regulation and Control Technology of Tobacco Brown Spot Disease

[Objective] The aim was to study regulation and control technology of tobacco brown spot disease.[Method] Resistance and the prevention and cure effect of different varieties,different fertilizer rate and transplanting period,different reagents on red star disease were compared.[Result] Tobacco 103 had strongest resistance,tobacco 100 and K326 followed,cloud 87 had CF205 were worst.N,P,K proportion of 1.0∶ 1.2∶3.0 or 1.0∶ 1.5∶3.0 was good,and applied nitrogen of 67.5-90.0 kg/hm2 was appropriate.May 5-20 was the most suitable cultivation period.Control effect of 40％ net sclerotium wettable powder on tobacco brown spot disease was the best with control effect of 53.44％.[Conclusion] The study provided a reference for prevention of tobacco brown spot disease.