生防菌剂对烟草主要土传病害防治效果研究

摘要

Field contrast test was conducted to study the control effects of bio-control agents on major soil-borne diseases of tobacco.The results showed that:the bio-control agents XE01 and X23 were more effective than streptomycini sulfas in the control of tobacco bacterial wilt.It reduced the incidence and disease severity of tobacco bacterial wilt.Compared with 72%streptomycini sulfas treatment,by using bio-control agents XE01 7500 mL/hm2 +X23 4500 mL/hm2 ,the control effect in-creased 11.17 percentage in the topping stage,and 13.53 percentage in the middle leaves harvesting stage.The bio-control agents have better value of application and dissemination.Although the bio-control agents XE01 and X23 could reduced the incidence and disease severity of tobacco black shank,but compared with the chemical agent of 72% ridomil-MZ,the con-trol effect was still had a certain distance.%通过小区对比试验，研究了生防菌剂对烟草主要土传病害的防治效果。结果表明：生防菌剂 XE01与 X23能有效降低烟草青枯病发病几率和发病程度，其中施用生防菌剂 XE017500 mL／hm2＋X234500 mL／hm2处理，在打顶期和中部叶采收期防效较72％农用硫酸链霉素5000倍液分别提高了11.17％、13.53％，具有较好的推广应用价值。生防菌剂虽能在一定程度上降低烟草黑胫病发病几率和发病程度，但其防治效果与72％甲霜·锰锌相比还有一定的差距。