Study on the Fungus Agroathelia rolfsii YBS24 Causing Basal Stem,  Root Rot Disease of Cassava

Date Received: 12-01-2026

Date Accepted: 09-04-2026

Date Published: 25-06-2026

##submissions.doi##: https://doi.org/10.31817/tckhnnvn.2026.24.6.02

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Nguyen, D. T., Hang, L., Kien, T., Hung, N., & Hoat, T. (2026). Study on the Fungus Agroathelia rolfsii YBS24 Causing Basal Stem,  Root Rot Disease of Cassava. Vietnam Journal of Agricultural Sciences, 24(6), 745–753. https://doi.org/10.31817/tckhnnvn.2026.24.6.02

Study on the Fungus Agroathelia rolfsii YBS24 Causing Basal Stem,  Root Rot Disease of Cassava

Duong Thi Nguyen 1 , Le Thi Hang , Tran Trung Kien 1 , Nguyen Manh Hung , Trinh Xuan Hoat (*) 2

  • Tác giả liên hệ: [email protected]
  • 1 Trường Đại học Nông Lâm, Đại học Thái Nguyên
  • 2 Viện Bảo vệ thực vật

    • Keywords

    Agroathelia rolfsii, basal stem and root rot disease, cassava, Manihot esculenta Crantz

    Abstract


    Basal stem and root rot is one of the most destructive diseases causing serious losses in both yield and quality of cassava in many growing regions of Vietnam, particularly in the northern mountainous provinces. This study was conducted to identify the causal agent of cassava basal stem and root rot in Lao Cai province, Vietnam, and to evaluate its biological characteristics. Isolation, artificial inoculation, morphological characterization, and internal transcribed spacer (ITS) region sequence analysis were used in this study. The results indicated that isolate Agroathelia rolfsii YBS24 is the causal pathogen of basal stem and root rot of cassava. The fungus exhibited optimal growth on PDA medium. The fungus grew over a wide pH range, from 4 to 9, with optimal growth between pH 5 and 8. It also grew over a relatively wide temperature range of 15-35°C, with temperatures between 25°C and 30°C being most favorable for mycelial growth. The results of this study provide a crucial scientific foundation for developing effective and sustainable management strategies for cassava basal stem and root rot disease.

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