种子(包括块根、块茎、苗木等繁殖材料)是传播病害的最为有效的载体,很多病害都是通过种子传播的。种子感病除了在生长季节外,在非生长季节同样也可感病。田间感病种子在田间感病是作物抽穗、结荚或结 Seeds (including reproductive material such as tuberous roots, tubers, nursery stock) are the most effective carriers for the transmission of diseases, many of which are transmitted through seeds. In addition to the growing season, the seed is also susceptible to non-growing seasons. Field Sick Seeds Sick in the field is crop heading, pods or knots