Whitefly (Bemisia tabaci Gennadius) on Cassava in Vietnam:  Cryptic Species and Transmission Characteristics  of Sri Lankan Cassava Mosaic Virus (Begomovirus stanleyi)

Date Received: 24-11-2025

Date Accepted: 01-02-2026

Date Published: 28-02-2026

##submissions.doi##: https://doi.org/10.31817/tckhnnvn.2026.24.2.06

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Chien, T., Sang, N., Viet, B., Truong, N., Kien, V., Hoat, T., & Cuong, H. (2026). Whitefly (Bemisia tabaci Gennadius) on Cassava in Vietnam:  Cryptic Species and Transmission Characteristics  of Sri Lankan Cassava Mosaic Virus (Begomovirus stanleyi). Vietnam Journal of Agricultural Sciences, 24(2), 193–204. https://doi.org/10.31817/tckhnnvn.2026.24.2.06

Whitefly (Bemisia tabaci Gennadius) on Cassava in Vietnam:  Cryptic Species and Transmission Characteristics  of Sri Lankan Cassava Mosaic Virus (Begomovirus stanleyi)

Tran Van Chien 1 , Nguyen Thanh Sang 2 , Bui Quoc Viet 2 , Nguyen Dan Truong 2 , Vo Trung Kien 2 , Trinh Xuan Hoat 3 , Ha Viet Cuong (*)

  • Tác giả liên hệ: [email protected]
  • 1 2Trung tâm Kiểm dịch thực vật sau nhập khẩu I, Cục Trồng trọt và Bảo vệ thực vật
  • 2 Đại học Nông Lâm Tp. Hồ Chí Minh
  • 3 Viện Bảo vệ Thực vật

    • Keywords

    AsiaII-1, haplotype, mtCOI, transmission efficacy, SLCMV

    Abstract


    This study aimed to identify the cryptic species of the whitefly (Bemisia tabaci) infesting cassava in Vietnam and to characterize its transmission of Sri Lankan cassava mosaic virus (SLCMV) (Begomovirus stanleyi). The study employed mitochondrial cytochrome c oxidase subunit I (mtCOI) gene sequence analysis of 47 whitefly samples collected from cassava plants in 10 provinces, together with experiments assessing the virus transmission ability of whiteflies. The results showed that all whitefly samples belonged to the cryptic species AsiaII-1. The AsiaII-1 population on cassava in Vietnam and across Asia, mainly in Southeast Asia, exhibited a small effective population size, low genetic diversity, and dominance of haplotype H2. The minimum acquisition access period and inoculation access period for SLCMV were 1 hour and 15 minutes, respectively. Female whiteflies transmitted the virus more efficiently than males; the virus was transmittable through mating between adult whiteflies, whereas whitefly age had no clear effect on transmission efficiency. In conclusion, this study provides a scientific basis for the development of effective management strategies for cassava mosaic disease in Vietnam.

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