Isolation and Characterization of Beauveria caledonica (Ascomycota: Hypocreales) Strains for Biological Control of Odoiporus longicollis Oliver (Coleoptera: Curculionidae)
文献类型： 外文期刊
作者： Ding, Mingbi 1 ; Wu, Li 1 ; Yu, Hongwei 1 ; Fan, Huacai 1 ; Guo, Zhixiang 1 ; Xu, Shengtao 1 ; Chun, Jianhui 2 ; Wang, Yongfen 1 ; Zheng, Si-Jun 1 ;
作者机构： 1.Agr Environm & Resources Inst, Yunnan Acad Agr Sci, Yunnan Key Lab Green & Control Agr Transboundary P, Kunming 650205, Peoples R China
2.Yunnan Univ, Resource Plant Res Inst, Kunming 650604, Peoples R China
3.Yunnan Acad Agr Sci, Inst Trop & Subtrop Econ Crops, Baoshan 678000, Peoples R China
4.Biovers Int, Kunming 650205, Peoples R China
关键词：
期刊名称：MICROORGANISMS （ 影响因子：4.2； 五年影响因子：4.6 ）
ISSN：
年卷期： 2025 年 13 卷 4 期
页码：
收录情况： SCI
摘要： The banana pseudostem weevil (BPW), Odoiporus longicollis (Oliver), is one of the most destructive pests of bananas that is seriously affecting the yield and quality of bananas. We isolated pathogens from banana pseudostem weevils in Xishuangbanna and Dongchuan, Yunnan, China, and explored their biological characteristics. The pathogenicity of the strains was verified through laboratory and greenhouse inoculation experiments. The results showed that four strains of fungi were identified and confirmed as Beauveria caledonica (Bc) via ITS-rDNA sequencing. Optimal in vitro culture conditions were found to be a photoperiod of 24 h light, 25 degrees C temperature, and 18 days on potato dextrose agar (PDA) medium with insect meal. Under these conditions, the Cs-1 strain achieved a colony diameter of 65.17 +/- 0.74 mm and spore production of 1.24 x 108 cfu/cm2. The Cs-1 strain had the shortest lethal time (LT50) of 9.36 days at an inoculum of 1.00 x 109 cfu/mL, with a lethality of 86.67% after 20 days. The Cs-3 strain showed 77.78% lethality at 1.00 x 108 cfu/mL after 20 days. Despite variations in virulence, lethality did not correlate with major cuticle-degrading enzymes. The Cs-3 strain demonstrated effective biocontrol in greenhouse tests. Banana plants suffered significant damage without Bc-treated BPW, while the treated plantlets thrived. The mortality rate reached 82.78% after 35 days. This study marks the first identification of these entomopathogenic fungi (EPF) in Yunnan, China, highlighting B. caledonica's potential for biocontrol application.
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