Tomato yellow leaf curl disease and management in Northern Vietnam
2009
Ngo Bich Hao, Hanoi Agricultural Univ., Trau Qui Gia Lam, Hanoi (Vietnam) | Natsuaki, K., Tokyo Univ. of Agriculture Setagaya, Tokyo (Japan) | Nguyen Viet Hai, Post Entry Plant Quarantine, no. 1 Chem Tu Liem, Hanoi (Vietnam) | Ha Viet Cuong | Nguyen Ha Thi Quynh Trang | Vu Van Hai, Hanoi Agricultural Univ., Trau Qui Gia Lam, Hanoi (Vietnam)
Tomato yellow leaf curl disease (TYLCD) is the main limiting factor to production of tomato in North Vietnam. The causing agents of this disease as a complex of virus species that in nature are transmitted by the whitefly Bemissia tabaci. In the field, the disease is caused by at least two viruses of the genus Begamovirus (family Geminiviridae) with ss DNA, tomato leaf curl Vietnam virus (ToLCVVG, AF264063) and tomato yellow leaf curl Vietnam virus (TYLCVNV) and they are found in tomato leaf samples with yellow leaf curl symptom by PCR using specific primers for ToLCVV (ToLCVV-sp-F2 and ToLCVV-sp-R2) and TYLCVNV (TYLCVNV-sp-F2 and TYLCVNV-sp-R1). Management of the disease using tomato resistant varieties Magic and Savior and by vector control using yellow traps, a bio product 'Somec 2 SL', Bion and a pesticide Actara 25 WG, showed effective to decrease the population of the virus vector Bemissia tabaci and the occurrence of the disease in the fields.
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