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Abstract

From February 2024 to April 2025, a survey and sample collection of banana stem weevil (Odoiporus longicollis) infected by entomopathogenic fungi was conducted in seven communes/wards across banana-growing areas along the Day River (Thanh Oai, Binh Minh, Quan Bi, Chuong My and Yen Nghia) in Hanoi, Vietnam. The objective was to investigate the presence of entomopathogenic fungi infecting the banana stem weevil Odoiporus longicollis Olivier (Coleoptera: Curculionoidea: Rhynchophoridae). The surveyed banana cultivars included chuoi ngu, chuoi la, and chuoi tieu. Field observations showed fungal infection rates of 5.9-9.4% in larvae, 2.4-4.2% in pupae, and 1.7-2.4% in adults. Isolation, culture, morphological characterization, and molecular analysis identified the fungal species as Metarhizium anisopliae. This fungus was detected in most surveyed areas, with high occurrence from September to February of the following year. Under laboratory conditions, M. anisopliae exhibited higher infection efficacy than in the field, with infection rates after 14 days reaching 18.5% (larvae instar 3-4), 31.9% (instar 5-6), 12.6% (pupae), and 10.4% (adults). These findings suggest that M. anisopliae is a promising biological control agent for managing O. longicollis in banana cultivation areas of Hanoi.

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How to Cite
Do Xuan Dat, Nguyen Thi Chuc Quynh, Bach Thi Diep, & Lai Tien Dung. (2025). Identification of entomopathogenic fungi and assessment of their virulence against the banana pseudostem weevil (Odoiporus longicollis Olivier). E-Journal of Agricultural Science and Technology, 9(3), 5097–5107. https://doi.org/10.46826/huaf-jasat.v9n3y2025.1275
Section
PLANTS

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