KẾT QUẢ ĐIỀU TRA MỨC ĐỘ BỆNH BẠC LÁ TRÊN CÁC GIỐNG LÚA VÀ ĐIỀU KIỆN CANH TÁC KHÁC NHAU Ở VĨNH PHÚC

Bacterial leaf blight cause by Xanthomonas oryzae pv. oryzae is one of the most serios disease of rice causing economic loss in Vietnam. The severity of disease is most severe in intensive farming system with high yielding and short duration rice varieties. The surveys of severity of disease in Summer-Autumn rice crop in Vinh Phuc province showed that the severity of disease of hybride rice is more severe than that of convertional rice varieties; the disease is also more severe in mid-field and low- field as compared to of- field.