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在鲁北地区3市15个县(市、区),对西瓜的8种常发性病害的发生频率、病株率、病情指数进行了7年的调查统计,对部分病害的产量损失、病原菌对部分杀菌剂的抗药性进行了测定。以克服病原菌抗药性和降低农药残留,实行无公害化生产为目标,提出了以实行轮作或选用抗病品种、种子处理、育苗期处理等农业防治措施,和使用中生菌素、甲壳素类抗病活化剂等新型药剂为主导药剂的化学防治措施。
In the three counties (cities and districts) of 3 cities of Lubei area, the frequency, strain rate and disease index of 8 kinds of common diseases of watermelon were surveyed for 7 years. The yield loss of some diseases, Resistance to some fungicides was determined. In order to overcome the resistance of pathogenic bacteria and reduce pesticide residues and to implement pollution-free production, we put forward the agricultural prevention and control measures such as crop rotation or selection of disease-resistant varieties, seed treatment and seedling treatment, and the use of antibiotics, chitin Disease-resistant activators and other new agents as the leading chemical control measures.