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Efficacy of the bacterium Lysobacter enzymogenes strain ch3B10 as a new biocontrol agent on the pathogenic fungi Alternaria solani and Fusarium oxysporum under laboratory conditions
Egyptian Journal of Biological Pest Control ( IF 2.4 ) Pub Date : 2022-06-20 , DOI: 10.1186/s41938-022-00569-9
Alharbi, Asmaa Ahmed

The plant pathogenic fungi, Alternaria solani and Fusarium oxysporum, are considered among the fungal pathogens which cause severe damages to tomato plants. The application of chemicals fungicides reduced fungal infection and entails great risks to human health and to the environment. Using biological control agents is considered one of the most effective techniques which suppress fungal pathogens and preserve the environment. The beneficial bacterium, Lysobacter enzymogenes, is applied as a biocontrol agent against different plant pathogens. The present work was carried out, under laboratory conditions, to investigate the efficacy of L. enzymogenes different concentrations of the strain ch3B10 on controlling the linear growth of A. solani and F. oxysporum compared to using the fungicide Benlate®. Treatment with Benlate® and the highest concentration (2 × 108 CFU/ml) of L. enzymogenes strain ch3B10 showed the highest inhibition of 70.6–94.0% on linear growth of all the tested fungi. Also, treatments with two concentrations (2 × 106 and 2 × 107 CFU/ml) of L. enzymogenes strain ch3B10 inhibited linear growth of all tested fungi by means of 47.1–69.7%. The low concentration of 2 × 103 CFU/ml of the strain ch3B10 resulted in the lowest linear growth inhibition 19.8–28.1% in all tested than the check treatment. Further experiments under both greenhouse and field conditions are needed to approve the efficacy of the strain ch3B10 as an effective bioagent and ecologically safer approach than chemical treatments.

中文翻译:

产酶溶菌菌ch3B10菌作为新型生防菌对病原真菌病原菌秋枯病菌和尖孢镰刀菌在实验室条件下的功效研究

植物病原真菌,茄属链格孢菌和尖孢镰刀菌,被认为是对番茄植物造成严重损害的真菌病原体之一。化学杀菌剂的应用减少了真菌感染,并对人类健康和环境造成了巨大风险。使用生物控制剂被认为是抑制真菌病原体和保护环境的最有效技术之一。有益细菌 Lysobacter enzymogenes 被用作针对不同植物病原体的生物防治剂。目前的工作是在实验室条件下进行的,以研究与使用杀菌剂 Benlate® 相比,不同浓度的菌株 ch3B10 的 L. enzymogenes 在控制 A. solani 和 F. oxysporum 线性生长方面的功效。用 Benlate® 和最高浓度 (2 × 108 CFU/ml) 的 L. enzymogenes 菌株 ch3B10 处理显示对所有测试真菌的线性生长的最高抑制率为 70.6-94.0%。此外,用两种浓度(2 × 106 和 2 × 107 CFU/ml)的 L. enzymogenes 菌株 ch3B10 处理可抑制所有测试真菌的线性生长 47.1-69.7%。ch3B10 菌株 2 × 103 CFU/ml 的低浓度导致所有测试中的最低线性生长抑制比检查处理低 19.8-28.1%。需要在温室和田间条件下进行进一步的实验,以证明菌株 ch3B10 作为一种有效的生物制剂和比化学处理更安全的生态方法的功效。此外,用两种浓度(2 × 106 和 2 × 107 CFU/ml)的 L. enzymogenes 菌株 ch3B10 处理可抑制所有测试真菌的线性生长 47.1-69.7%。ch3B10 菌株 2 × 103 CFU/ml 的低浓度导致所有测试中的最低线性生长抑制比检查处理低 19.8-28.1%。需要在温室和田间条件下进行进一步的实验,以证明菌株 ch3B10 作为一种有效的生物制剂和比化学处理更安全的生态方法的功效。此外,用两种浓度(2 × 106 和 2 × 107 CFU/ml)的 L. enzymogenes 菌株 ch3B10 处理可抑制所有测试真菌的线性生长 47.1-69.7%。ch3B10 菌株 2 × 103 CFU/ml 的低浓度导致所有测试中的最低线性生长抑制比检查处理低 19.8-28.1%。需要在温室和田间条件下进行进一步的实验,以证明菌株 ch3B10 作为一种有效的生物制剂和比化学处理更安全的生态方法的功效。
更新日期:2022-06-20
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