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通过定田、同品种、同时、同方法、同步调查观察，结果表明，直播稻、抛秧稻和移栽稻病虫 害发生种类基本相同，发生量和为害程度有一定的差异，多种病虫害发生和为害程度为直播稻重于抛秧稻，抛秧稻又重于移栽稻。早稻抛秧稻病虫为害程度与不同育秧方式和秧苗素质有关，适量施用钾肥能提高稻株抗病虫能力，减轻稻纹枯病和稻飞虱等的为害。直播晚粳稻植株密度，会影响病虫害的发生程度。根据轻简栽培水稻病虫发生特点，应加强综合防治力度，有效地控制病 虫为害。
The results showed that the occurrence types of pests and diseases were the same in direct-seeded rice, transplanted rice and transplanted rice, and there was a certain difference in the amount of occurrence and degree of pest damage. The occurrence of various pests and diseases and Harm degree of direct seeding rice is more important than throwing rice, throwing rice is more important than transplanting rice. The damage degree of pest and disease caused by rice seedling in early rice is related to the different ways of raising seedlings and the quality of seedlings. Appropriate amount of potash fertilizer can increase the resistance to pests and diseases of rice plant, and reduce the damage of rice sheath blight and planthopper. Planting late japonica rice density, will affect the occurrence of pests and diseases. According to the characteristics of light-weight cultivated rice pests and diseases, we should strengthen the comprehensive prevention and control efforts to effectively control pests and diseases.