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中国农学通报 ›› 2021, Vol. 37 ›› Issue (5): 83-87.doi: 10.11924/j.issn.1000-6850.casb2020-0071

所属专题: 玉米 烟草种植与生产

• 植物保护·农药 • 上一篇    下一篇

玉米大斑病生防菌的筛选、鉴定及应用研究

张齐凤1(), 李永刚2(), 刘博3   

  1. 1黑龙江省植检植保站,哈尔滨 150090
    2东北农业大学农学院,哈尔滨 150030
    3中国农业大学植物保护学院,北京 100193
  • 收稿日期:2020-05-07 修回日期:2020-07-07 出版日期:2021-02-15 发布日期:2021-02-25
  • 通讯作者: 李永刚
  • 作者简介:张齐凤,女,1982年出生,黑龙江哈尔滨人,高级农艺师,硕士,研究方向:植物保护。通信地址:150090 黑龙江哈尔滨市香坊区珠江路21号 黑龙江省植检植保站,E-mail: qfzhang2006@163.com
  • 基金资助:
    国家“十三五”粮食丰产增效科技创新专项“东北春玉米区主要病虫草害的绿色防控技术”(2016YFD0300704);国家自然基金面上项目“基于代谢组学探究苜蓿连作障碍的机制”(31971760);黑龙江省饲草饲料现代农业产业技术协同创新推广体系支持

Biocontrol Bacteria Against Northern Corn Leaf Blight: Screening, Identification and Application

Zhang Qifeng1(), Li Yonggang2(), Liu Bo3   

  1. 1Heilongjiang Plant Quarantine and Plant Protection Station, Harbin 150090
    2Agricultural College, Northeast Agricultural University, Harbin 150030
    3Plant Protection College, China Agricultural University, Beijing 100193
  • Received:2020-05-07 Revised:2020-07-07 Online:2021-02-15 Published:2021-02-25
  • Contact: Li Yonggang

摘要:

为了从生物途径探索有效控制大斑病在玉米生产带来的危害,本试验以玉米大斑病菌(Setosphaeria turcica)为目标菌株,采用对峙法和盆栽接种试验获取生防菌,并测定其盆栽防治效果。结果表明:从128株玉米内生细菌获得1株对玉米大斑病菌拮抗效果最佳的菌株,最长半径与最短半径比值为2.9。从玉米内部分离到的内生生防细菌YD7对大斑病菌具有较强拮抗效果。根据YD7菌株形态培养特征、生理生化特征及16S rDNA序列分析结果鉴定为解淀粉芽孢杆菌。经过2次盆栽测定,YD7对玉米大斑病防治效果分别为78.2%和77.8%。综合表明,YD7防治玉米大斑病具有很好的开发前景。

关键词: 玉米大斑病, 生防菌, 拮抗效果, 鉴定

Abstract:

In order to explore the biological way to effectively control the damage of northern corn leaf blight in corn production, Setosphaeria turcica was used as the targeted strain. The biocontrol bacteria were obtained using confrontation method and pot inoculation test. The control effect of pot inoculation test was determined. The results showed that one strain with the best antagonistic effect was obtained from 128 strains of endophytic bacteria. The ratio of the longest radius to the shortest radius was 2.9. The biocontrol bacteria YD7 was screened from corn endophytic bacteria and it had relatively strong antagonistic effect against S. turcica. According to the morphological, physiology-biochemical characteristics and 16S rDNA sequence analysis, YD7 was identified as Bacillus amyloliquefaciens. By two potted experiments, the control effects of YD7 were 78.2% and 77.8%, respectively. Thus, YD7 has well developing prospect on controlling northern corn leaf blight.

Key words: northern corn leaf blight, biocontrol bacteria, antagonistic effect, identification

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