河南农业科学 ›› 2023, Vol. 52 ›› Issue (10): 92-99.DOI: 10.15933/j.cnki.1004-3268.2023.10.010

• 植物保护 • 上一篇    下一篇

草莓叶枯病生防芽孢杆菌的分离鉴定及防效研究

梁松1,孟祥坤1,2,于新1,徐文凤1,邢芳芳1,郑树林2,李新柱1,3,王亮1   

  1. (1.金正大生态工程集团股份有限公司,山东 临沭 276700;2.菏泽金正大生态工程有限公司,山东 菏泽 274000;3.广东清远金正大农业研究院有限公司,广东 清远 511500)
  • 收稿日期:2023-02-27 出版日期:2023-10-15 发布日期:2023-11-08
  • 通讯作者: 孟祥坤(1982-),男,山东临沂人,副研究员,硕士,主要从事生物肥料创制及植物病害生物防控研究。E-mail:mengxiangkun@kingenta.com
  • 作者简介:梁松(1998-),男,山东泰安人,硕士,主要从事植物病害的生物防治研究。E-mail:liangsongshandong@163.com
  • 基金资助:
    山东省重点研发计划项目(2018TSCYCX-37)

Isolation and Identification of Bacillus for Biocontrol of Leaf Blight of Strawberry and Study on Its Biocontrol Effect

LIANG Song1,MENG Xiangkun1,2,YU Xin1,XU Wenfeng1,XING Fangfang1,ZHENG Shulin2,LI Xinzhu1,3,WANG Liang1   

  1. (1.Kingenta Ecological Engineering Group Co.,Ltd.,Linshu 276700,China;2.Heze Kingenta Ecological Engineering Group Co.,Ltd.,Heze 274000,China;3.Guangdong Qingyuan Kingenta Agricultural Research Institute Co.,Ltd.,Qingyuan 511500,China)
  • Received:2023-02-27 Published:2023-10-15 Online:2023-11-08

摘要: 为筛选防治草莓叶枯病的生防芽孢杆菌(Bacillus spp.),采集健康草莓根际土壤,采用稀释涂布平板法和平板对峙法,筛选对草莓叶枯病具有较高防效的芽孢杆菌,采用形态学、生理生化鉴定及分子生物学方法对其进行鉴定,并初步研究其发酵特性,同时采用室内离体叶片法对其防治效果进行验证,通过血平板法和盆栽试验法对菌株安全性进行检测。结果表明,筛选得到一株对草莓叶枯病菌(Neopestalotiopsis clavispora)具有较高抑制效果的芽孢杆菌B125,其平板抑菌率达到75.44%,经形态学、生理生化鉴定及分子生物学鉴定,其为贝莱斯芽孢杆菌(Bacillus velezensis)。利用液体发酵培养以及热风干燥法制备得到菌株B125菌粉,其菌粉对草莓叶枯病的室内离体叶片防效达到61.69%,安全性试验表明,该菌株不具备溶血性,对作物生长无害且可以显著促进作物生长。综上,贝莱斯芽孢杆菌B125能够显著抑制草莓叶枯病菌的生长,具有较高的工业生产开发价值。

关键词: 草莓叶枯病, 生物防治, 新拟盘多毛孢, 贝莱斯芽孢杆菌, 防治效果

Abstract: In order to screen the biocontrol Bacillus spp.against strawberry leaf blight disease(Neopestalopsis clavispora),the healthy strawberry rhizosphere soil was collected,and Bacillus with high control effect against strawberry leaf blight was screened by dilution coating plate method and plate confrontation method,and identified by morphological,physiological and biochemical identification and molecular biological method,and its fermentation characteristics were preliminarily studied.The control effect was verified by the method of isolated leaves in the laboratory,and the safety of the strain was tested by the blood plate method and the pot test method.The results indicated that a strain of Bacillus B125 with high inhibitory effect on strawberry leaf blight was screened,and its plate inhibitory rate reached 75.44%. It was identified as Bacillus velezensis by morphology,physiological and biochemical identification and molecular biology.The bacterial powder of strain B125 was prepared by liquid fermentation and hot‑air drying.The indoor control effect of the bacterial powder on strawberry leaf blight reached 61.69%.The safety test showed that the strain had no hemolysis,was harmless to crop growth and could significantly promote crop growth.Overall,Bacillus B125 can significantly inhibit the growth of strawberry leaf blight pathogen,and has high industrial production and development value.

Key words: Leaf blight disease of strawberry, Biological control, Neopestalotiopsis clavispora, Bacillus velezensis, Control effect

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