放线菌KN37菌株代谢物对番茄灰霉病的防治

The Control Effect of Actinomycete Strain KN37 against Tomato Gray Mold

采用离体和活体试验,研究KN37菌株代谢物对番茄灰霉病的防治效果,并利用分子手段对KN37菌株进行了初步鉴定。结果表明,放线菌KN37菌株代谢物可强烈抑制番茄灰霉病菌的菌丝生长和孢子萌发,对细菌性斑点病菌、番茄早疫病菌和油菜菌核病菌的抑制率达到90%以上,且对葡萄灰霉病具有较好的防治效果。由此可见,放线菌KN37菌株代谢物具有较好的开发潜力。

In order to clarify the control effect of the fermentation product of actinomycete strain KN37 on plant diseases, we determined the antimicrobial spectrum of its broth in vitro and in vivo, and identified KN37 strain at a molecular level. The results showed that KN37 strain had a high inhibitory effect on mycelial growth and spore germination of Botrytis cinerea . This strain also showed high inhibition activities on Pseudomonas syringae, Alternaria solani and Botrytis cinereal , with their inhibition rate being higher than 90% The strain KN37 had a high control effect on tomato gray mold in vivo , and, therefore, has a potential of research and development in the field of microbial pesticides.