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中国生物防治学报 ›› 2023, Vol. 39 ›› Issue (2): 355-365.DOI: 10.16409/j.cnki.2095-039x.2023.02.018

• 研究论文 • 上一篇    下一篇

公牛链霉菌JPD-1可湿性粉剂的研制及对苹果斑点落叶病的防效

李小伟, 李兴昱, 薛应钰   

  1. 甘肃农业大学植物保护学院/甘肃省农作物病虫害生物防治工程实验室, 兰州 730070
  • 收稿日期:2022-05-27 发布日期:2023-04-13
  • 通讯作者: 薛应钰,教授,硕士生导师, E-mail:xueyy@gsau.edu.cn。
  • 作者简介:李小伟,男,硕士研究生,E-mail:1696429577@qq.com。
  • 基金资助:
    国家重点研发计划(2016YFD0201100);甘肃省农牧厅农业生物技术研究与应用开发项目(GNSW-2012-27)

Development of Streptomyces tauricus JPD-1 Wettable Powder and Its Biocontrol Efficiency on Apple Alternaria Leaf Spot Determination

LI Xiaowei, LI Xingyu, XUE Yingyu   

  1. College of Plant Protection, Gansu Agricultural University/Biocontrol Engineering Laboratory of Crop Diseases and Pests of Gansu Province, Lanzhou 730070, China
  • Received:2022-05-27 Published:2023-04-13

摘要: 以公牛链霉菌Streptomyces tauricus JPD-1为研究对象,苹果斑点落叶病菌Alternaria alternate f. sp. mali作为靶标菌,采用混料设计试验对载体、分散剂、湿润剂、紫色保护剂进行筛选,确定了公牛链霉菌JPD-1可湿性粉剂的最佳配方:载体为硅藻土,母粉89%,分散剂羧甲基纤维素钠4%,润湿剂十二烷基磺酸钠6%,紫外保护剂羧甲基纤维素钠1%。按照此配方研制出了白色粉末状的公牛链霉菌JPD-1可湿性粉剂。质量标准测定和室内防效试验结果表明,该可湿性粉剂孢子含量为2.18×108cfu/g,杂菌率2.45%,pH 5.8,细度91.95%,干燥减量4.81%,润湿时间15.4 s,悬浮率79.67%,在25 ℃室温下贮藏100 d芽胞存活率为70.15%;4 ℃条件下贮藏100 d芽胞存活率为80.41%;其对斑点落叶病菌孢子萌发的最小抑菌浓度在25~50 mg/mL,对苹果斑点落叶病的防治效果84.42%,结果表明公牛链霉菌JPD-1可湿性粉剂是一种具有较好生物防治潜力的生防制剂。

关键词: 公牛链霉菌JPD-1, 苹果斑点落叶病, 可湿性粉剂, 防效

Abstract: Streptomyces tau-ricus JPD-1 and Alternaria alternate f. sp. mali were considered as the research objects and target pathogen, respectively to screen the carriers, dispersants, wetting and ultraviolet protective agents by the mixture design methods. S. tauricus JPD-1 wettable powder was developed according to the following formula. The optimal formulation was listed as carrier-diatomaceous earth and 89% original powder, dispersant-4% carboxymethyl cellulose sodium, wetting agent-6% sodium dodecyl sulfonate, and ultraviolet protective agent-1% carboxymethyl cellulose sodium. The results showed that the spore content, miscellaneous microorganism rate, pH value, purity rate, drying reduction, wetting time and suspension rate of S. tauricus JPD-1 wettable powder were 2.18×108 cfu/g, 2.45%, 5.8, 91.95%, 4.81%, 15.4 s and 79.67%, and the survival rates of its spores were 70.15% and 80.41% at 25 ℃ for 100 days, and 4 ℃ for 100 days, respectively, by determining the quality standard. The minimum inhibitory concentration of S. tauricus JPD-1 wettable powder spore germination was 25-50 mg/mL, and the controlling efficiency on apple Alternaria leaf spot disease was 84.42% in vitro. The results indicate that the S. tauricus JPD-1 wettable powder is a potential biocontrol agent with high efficiency in controlling of apple Alternaria leaf spot disease.

Key words: Streptomyces tauricus JPD-1, apple Alternaria leaf spot, wettable powder, control efficiency

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