不同微生物菌剂对烟草青枯病的协同防控效果研究

Study on the Coordinate Control Effect of Tobacco Bacterial Wilt with Different Microbial Agents

微生物菌剂在构建作物根际生物屏障,阻碍土传病原菌入侵过程中发挥着重要作用,已成为近年来的研究热点.本研究通过田间试验分别探究了根茎康菌剂、多粘类芽孢杆菌剂、哈茨木霉菌剂等3种微生物菌剂单独及混合施用对烟草青枯病的影响.结果表明,3种微生物菌剂均可显著控制青枯病的发生,促进烟苗生长.根茎康微生物菌剂处理在移栽期能有效促进烟株生长,防控田间烟草青枯病的发生,整体防效在49%以上,而补充多粘类芽孢杆菌和哈茨木霉的复合菌剂处理,能进一步提升防控效果,整体防效可达55%以上.本研究为今后烟草青枯病的生物防治提供了理论基础.

Microbial agents play an important role in the construction of a crop rhizosphere biological barrier to prevent the invasion of soil-borne pathogens,which has become a research hotspot in recent years.In order to provide a theoretical basis for the biological control of tobacco bacterial wilt in the future,field experiments were conducted to explore the effects of single and mixed application of three microbial agents on tobacco bacterial wilt.The results revealed that all the three kinds of microbial agents possessed a remarkable effect of controlling disease and promoting the growth of tobacco plants.When applied in the seedling transplanting period,Genjingkang,a recently developed microbial agent,effectively promoted the growth of the tobacco plants and controlled tobacco bacterial wilt,the overall control efficiency being more than 49%,while the addition of Bacillus polymyxa and Trichoderma harzianum compound agent further improved the control efficiency(>55%).