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我国已加入“WTO”，市场发展有新的需求，生产优质水稻，发展绿色大米，势在必行。随着水稻种植年限的延长，病、虫、草日益加重。特别在生产后期，出现一些早枯现象，造成减产，米质下降，效益减少；找出原因，采取相应的措施是十分必要的。通过调查，早枯类型主要有以下几种
China has acceded to the WTO and has a new demand in market development. It is imperative to produce good quality rice and develop green rice. With the extension of rice planting years, diseases, insects and grass are getting worse. Especially in the late stage of production, some premature wilting phenomena have resulted in a decrease in production and a decrease in the quality of rice, reducing the benefits. It is very necessary to find out the reasons and take corresponding measures. Through investigation, there are mainly the following types of morning sickness