“粮,关乎民之生死,国之存亡”。保障粮食安全是我国的粮食发展战略,关系国计民生,一直都受到党和国家的高度重视。病虫草害是影响粮食安全生产的重要因素。据全国植保专业统计资料记载,近年来我国每年由于病虫草为害潜在的粮食损失都在1 000亿kg以上,经过大力防治,每年可挽回粮食损失800多亿kg。由于植保工作技术性强, “Food, the life and death of the people, the survival of the country ”. Ensuring food security is a strategy of food development for our country and has a bearing on national economy and people’s livelihood. It has always been highly regarded by the party and the state. Pest, disease and weed are important factors that affect food safety in production. According to the national CPPCC statistics, in recent years, the potential food losses caused by pests and weeds in China each year are over 100 billion kg. After vigorous prevention and treatment, the annual grain losses can be recovered at over 800 billion kg. Due to the technical protection of plant protection,