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用农药防治蔬菜病害易造成药害和污染,并随着人民生活水平及对农产品安全意识的不断提高,发展无公害蔬菜已成为市场所需。对此,用生态技术防治蔬菜病害,减少蔬菜农药残留非常重要。一、清园一茬蔬菜收获后,很多病菌附着在蔬菜残枝上并散落田间,进入土壤中成为下茬蔬菜的污染源。因此,菜农应在蔬菜生长后期加强病虫害的防治,直接减少病原菌基数,并且在每茬蔬菜收获后,彻底清除残枝败叶,对易感根系病害的蔬菜还要清除残根。
With the prevention and treatment of vegetable diseases with pesticides can easily lead to injury and pollution, and with the people’s living standards and continuous improvement of awareness of safety of agricultural products, the development of pollution-free vegetables has become the market needs. In this regard, the use of ecological technology to prevent vegetable diseases and reduce pesticide residues in vegetables is very important. First, a harvest of vegetables in the Qingyuan after a lot of bacteria attached to the vegetable residue and scattered fields, into the soil into the next crop of vegetable sources of pollution. Therefore, vegetable growers should strengthen the prevention and control of pests and diseases in the later period of vegetable growth, directly reduce the base number of pathogens, and completely remove the leaves of fallen leaves after the harvest of vegetables in each crop, and also remove residual roots for the vegetables susceptible to root diseases.