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中国生物防治学报 ›› 2024, Vol. 40 ›› Issue (6): 1319-1330.DOI: 10.16409/j.cnki.2095-039x.2024.02.061

• 研究论文 • 上一篇    

哈茨木霉M-17厚垣孢子可湿性粉剂的研制及其对马铃薯干腐病的田间防效

王喜刚1, 郭成瑾1, 焦杨2, 赵沛1, 田静1, 张丽荣1, 沈瑞清1   

  1. 1. 宁夏农林科学院植物保护研究所/宁夏植物病虫害防治重点实验室, 银川 750002;
    2. 河西学院农业与生态工程学院, 张掖 734000
  • 收稿日期:2022-10-24 发布日期:2024-12-12
  • 通讯作者: 王喜刚, 沈瑞清
  • 作者简介:王喜刚,男,硕士,助理研究员,E-mail:wxg198712@163.com;通信作者,王喜刚,男,硕士,助理研究员,E-mail:wxg198712@163.com;沈瑞清,男,博士,研究员,E-mail:srqzh@sina.com。
  • 基金资助:
    宁夏农林科学院科技创新引导项目(NKYG-18-07);宁夏回族自治区自然科学基金项目(2023AAC05051);第五批“自治区青年科技人才托举工程”(NXKJTJGC2020027);农业高质量发展和生态保护科技创新示范项目(NGSB-2021-10-01)

Preparation of Wettable Powder Formulation of Trichoderma harzianum M-17 Chlamydospores and Its Field Control Effect on Potato Dry Rot

WANG Xigang1, GUO Chengjin1, JIAO Yang2, ZHAO Pei1, TIAN Jing1, ZHANG Lirong1, SHEN Ruiqing1   

  1. 1. Ningxia Key Laboratory of Plant Disease and Pest Control/Institute of Plant Protection, Ningxia Academy of Agriculture and Forestry Sciences, Yinchuan 750002, China;
    2. College of Agriculture and Ecological Engineering, Hexi University, Zhangye 734000, China
  • Received:2022-10-24 Published:2024-12-12

摘要: 为将生防真菌哈茨木霉M-17研制成防治马铃薯干腐病的微生物杀菌剂,延长产品的货架期,本研究以哈茨木霉M-17为研究对象,通过单因素筛选及配方优化,获得哈茨木霉M-17厚垣孢子可湿性粉剂,其组成为20%的厚垣孢子粉、68%的凹凸棒土为载体、4%的十二烷基硫酸钠为润湿剂、7%的羧甲基纤维素钠为分散剂、1%抗坏血酸为紫外保护剂。该可湿性粉剂的厚垣孢子含量为3.1×108 cfu/g,润湿时间为56.5 s,孢子悬浮率为82.27%,pH为6.79,含水量为2.26%,98%能通过74 µm标准筛,各项指标均符合国家标准。田间试验结果表明,哈茨木霉M-17厚垣孢子可湿性粉剂可以促进马铃薯植株生长,并对马铃薯干腐病表现出良好的防治效果,防效达70.32%,增产率为19.03%。本研究为将哈茨木霉M-17厚垣孢子可湿性粉剂开发成防治马铃薯土传病害的微生物杀菌剂奠定了技术基础。

关键词: 哈茨木霉, 厚垣孢子, 载体, 可湿性粉剂, 防效

Abstract: To development an efficient biocontrol antimicrobial agent of potato dry rot and prolong the shelf of the product, this study utilized Trichoderma harzianum M-17 as the primary research object. Single factor selection and formulation optimization were used to obtain the wettable powder (WP). The optimal formulation of WP was chlamydospore powder (20%), attapulgite (68%) as carrier, sodium dodecyl sulfonate (4%) as wetting agent, sodium carboxylcellulose (7%) as dispersion, and ascorbic acid (1%) as UV protective agent. The chlamydospore content of this WP was 3.1×108 CFU/g, the wetting time was 56.5 s, the spore suspension rate was 82.27%, pH 6.79, the moisture content was 2.26%, the ratio transiting standard test sieve with 74 µm was 98%. All indicators meet the national standards. The results of field experiments showed that T. harzianum M-17 chlamydospore wettable powder could promote the growth of potato plants and indicated a good control effect on potato dry rot, with a control efficacy of 70.32% and a yield increase rate of 19.03%. This study lays a technical foundation for the development of T. harzianum M-17 chlamydospore wettable powder into a microbial fungicide for the control of potato soil-borne diseases.

Key words: Trichoderma harzianum, chlamydospores, carrier, wettable powder, control effect

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