温室无土秧因不接触土壤,杜绝了一个重要的感病途径,但如管理不善,也可能有霉病、窝团黑根、黄化等侵染性病害和生理障害发生,必须采取相应措施进行防治。 1.霉病 这种病常发生在发叉和立针现青时期,初起时谷粒上面发生白霉如棉籽样,然后由白转黑,根部发生粘涎,严重时,霉点在秧盘内霉点星罗棋布,并迅速蔓延成团成片,致 Greenhouse soilless seedlings do not touch the soil, an important way to prevent the disease, but if not properly managed, may also have mildew, nest group black root, yellow and other infectious diseases and physical disorders, we must take appropriate measures Control. 1. mildew This disease often occurs in the hair fork and standing needle is green when the beginning of the grain above white mold like cottonseed, and then from white to black, the root occurs coh, severe, moldy seedling Spread of the dots inside the plate, and quickly spread into a group into pieces, caused