为了确保今年农业丰收,贯彻对病虫害防重于治的方针,必须抓住春播期几种作物的病虫害的防治工作,将这些病菌害虫消灭在始发阶段,不使蔓延为害。京郊目前大致有下列几种主要病虫害须在播种时进行防治。水稻病害水稻白叶枯病是当前我市的重要病害。传染途径很多,首先是带病种子传病。在一个地区如没有发生过白叶枯病,必须严格进行检疫,防止将带病种子传入。已发病 In order to ensure this year’s agricultural harvest, and implement the principle of prevention and control of pests and diseases, we must seize the prevention and control of pests and diseases of several crops in the spring sowing period, eradicate these pests in the initial stage of the disease, and do not make the spread harmful. At present, the following major pests and diseases in the suburbs of Beijing are to be controlled at the time of planting. Rice diseases Rice bacterial leaf blight is an important disease in our city at present. There are many ways of transmission, the first is the transmission of sick seeds. In the absence of any bacterial blight in a region, strict quarantine inspection must be conducted to prevent the introduction of the sick seeds. Has been onset