中国木薯褐斑病发病规律调查及田间防治药效试验

褐斑病是世界木薯种植中的常见病害,也是危害中国木薯的重要病害。在前期工作基础上,2011—2018年,笔者们对中国木薯主栽区开展了褐斑病的普查及发生规律研究工作。结果表明,褐斑病在中国木薯主要种植区域均有发生,部分地区发病严重,主栽品种均不具备抗病性。2个地点3个木薯品种的3年系统病情调查结果表明,病害通常在木薯生长中期发生,随后逐渐加重,中后期流行为害。田间试验结果表明,咪鲜胺、多菌灵、丙环唑、保叶清等杀菌剂对褐斑病的危害有较好的减轻作用,建议在生产中推广应用。

Occurrence Pattern Investigation and Fungicides Control Effect in Field for Cassava Brown Leaf Spot Disease in China

Brown leaf spot (BLS) is the common disease on in cassava worldwide, and it is also the important disease in China. Based on the previous study, the investigation and popular characteristic research in China was launched in our lab. The result showed BLS was widely occurred in the main cassava planting areas of China. BLS was seriously happened at partial cassava plantations, and most varieties were sensitive. In three years, the systematic investigation of three cassava varieties in two sites was finished. We found BLS usually occurred in the middle growing stage of cassava, increasing as the disease progressed, then popular and damage at mid-later stage. Field test studied illustrated Prochloraz, Carbendazim, Propiconazole had a better control effect for BLS, which was suggested to be used in cassava plantation.