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微胶囊的制备及其对黄瓜白粉病的生物防治

Preparation of Microcapsules and Biocontrol of Cucumber Powdery Mildew.

机构信息

Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education, Northeast Forestry University, Harbin, People's Republic of China.

Hubei Biopesticide Engineering Research Center, Wuhan, Hubei, People's Republic of China.

出版信息

Microbiol Spectr. 2023 Jun 15;11(3):e0508422. doi: 10.1128/spectrum.05084-22. Epub 2023 Apr 27.

DOI:10.1128/spectrum.05084-22
PMID:37102872
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10269890/
Abstract

Microencapsulation is an important technique for protecting the viability and activity of microorganisms under adverse environmental conditions. To improve biological control, controlled-release microcapsules of were prepared and embedded in combinations of the biodegradable wall materials sodium alginate (SA). The microcapsules were evaluated for their ability to control cucumber powdery mildew in the greenhouse. The results showed that the highest encapsulation efficiency of 95% was obtained by applying 1% SA and 4% calcium chloride. The microcapsules provided good, controlled release and UV resistance, and could be stored for a long time. The greenhouse experiment revealed that the microcapsules had a maximal biocontrol efficiency of 76% against cucumber powdery mildew. In summary, embedding in microcapsules is a promising technique to improve the survivability of conidia. The microcapsules exerted significant biocontrol efficiency against cucumber powdery mildew. is widely found in plant roots and soil and has been used for the biocontrol of various plant pathogens; however, the control efficiency of is usually unstable in field trials. To improve the control efficiency of , in the present study, microcapsules were prepared using sodium alginate as wall material to reduce the effects of temperature, UV irradiation, and other environmental factors on its activity, and to significantly improve its biocontrol efficiency on cucumber powdery mildew. Microcapsules can prolong the shelf life of microbial pesticides. This study provides a new way to prepare a biocontrol agent against cucumber powdery mildew with high efficiency.

摘要

微胶囊化是保护微生物在不利环境条件下的生存能力和活性的重要技术。为了提高生物防治的效果，制备了 的控释微胶囊，并将其嵌入可生物降解的壁材料海藻酸钠（SA）的组合中。在温室中评估了这些微胶囊控制黄瓜白粉病的能力。结果表明，通过施加 1%SA 和 4%氯化钙，获得了 95%的最高包封效率。微胶囊提供了良好的控制释放和耐 UV 性，并且可以长时间储存。温室实验表明， 微胶囊对黄瓜白粉病的最大生物防治效率为 76%。总之，将 嵌入微胶囊中是提高 分生孢子生存能力的一种很有前途的技术。 微胶囊对黄瓜白粉病具有显著的生物防治效率。 广泛存在于植物根和土壤中，已被用于防治各种植物病原菌；然而， 在田间试验中的控制效率通常不稳定。为了提高 的控制效率，本研究采用海藻酸钠作为壁材料制备 微胶囊，以减少温度、UV 辐射等环境因素对其活性的影响，显著提高其对黄瓜白粉病的生物防治效率。微胶囊可以延长微生物农药的货架期。本研究为制备高效防治黄瓜白粉病的生物防治剂提供了一种新途径。

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