最近,全国农业技术推广服务中心组织有关专家,对全国农作物重大病虫害今年发生趋势进行了综合分析和预测。结果表明:仍呈偏重发生态势。预计全年发生面积50亿亩,需要防治面积60亿亩次左右。发生期可能提早,迁飞性害虫发生趋重,虫害重于病害。蝗虫1.夏季东亚飞蝗发生面积将达146 Recently, the National Agricultural Technology Extension Service Center organized relevant experts to conduct a comprehensive analysis and forecast on the occurrence trends of major pests and diseases in crops throughout the country this year. The results show that: there is still a serious tendency. It is estimated that the annual area will be 5 billion mu and the control area needs to be 6 billion mu. The occurrence period may be earlier, migratory pests tend to occur, pests heavier than disease. Locusts 1. Summer migratory locusts area will reach 146