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每茬蔬菜采收后,均有许多病菌附在蔬菜的残枝腐叶上或散落田间、土壤中,给下茬蔬菜留下了侵染源。因此,菜农除在蔬菜生长期间加强病虫草的防治,以直接减少病源菌的基数外,还需在每茬蔬菜采收后,彻底清除田间残根、残枝、腐叶。尤其对春播蔬菜须搞好以下方面的综合防病工作:
After each harvest of vegetables, there are many bacteria attached to the rotten leaves of vegetables or scattered in the fields, soil, leaving the next crop of vegetables left a source of infection. Therefore, vegetable farmers in addition to strengthening the prevention and control of pests and diseases during the growth of vegetables in order to directly reduce the base of pathogenic bacteria, but also in the recovery of each vegetable harvest, the complete removal of residual roots, residual branches, rot leaves. Especially for spring sowing of vegetables, we must do a good job in the following aspects of integrated disease prevention: