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用农药防治蔬菜病害容易造成药害和污染,且成本较高,因此应大力提倡采用生态技术防治蔬菜病害。主要方法有以下几种: 1.清园。当一季蔬菜收获后,很多病菌附在蔬菜残叶上,这些残叶将成为下季蔬菜的污染源。因此在蔬菜生长后期应加强病害的防治,以直接减少病原菌基数。并且在每季蔬菜收获后彻底清除田间的残枝败叶,对易感根系病害的蔬菜还要彻底清除残根,以减少病害传染源。 2、消毒。在夏季蔬菜换茬间隙,深耕后应灌足水和盖上塑料薄膜进行高温消毒,可使土壤上层10厘米
Prevention and treatment of vegetable diseases with pesticides are likely to cause phytotoxicity and pollution, and the high cost, it should vigorously promote the use of ecological technology to prevent vegetable diseases. The main methods are the following: 1. Qingyuan. When a season of vegetables harvested, many bacteria attached to the residual leaves of vegetables, these leaves will become the next season, the source of pollution of vegetables. Therefore, in late vegetable growth should strengthen the prevention and treatment of diseases in order to directly reduce the number of pathogens. And after the harvest of vegetables in the field every day to eliminate residual leaves, susceptible to root diseases of vegetables but also to completely remove the residual roots, in order to reduce the source of disease infection. 2, disinfection. In the summer vegetable stubble clearance, after deep plowing enough water and plastic cover covered with high temperature disinfection, the soil can be 10 cm