记者从全国农业技术推广服务中心获悉,近日,为准确掌握冬前农作物重大病虫发生和越冬基数,做好2017年发生趋势预测工作,该中心组织4个专家组分赴华南、黄淮、华北和西北9个省(直辖市)18个县开展重大病虫冬前发生和越冬基数调查活动。调查活动期间,专家们交流了2016年各省农作物重大病虫发生特点及冬前基数情况,并结合本次调查结果、越冬 The reporter learned from the National Agricultural Technology Extension Service Center that recently, in order to accurately grasp the occurrence of major pests and winter crops in winter and the base of winter, do a good job in predicting the trend in 2017. The center organizes 4 expert groups to go to South China, Huanghuai and North China And 18 counties in 9 provinces (municipalities directly under the Central Government) in Northwest China carried out surveys on the occurrence of major pest and winter overcast base. During the investigation, experts exchanged the characteristics of major pests and diseases in various provinces and the base of winter before the survey. Based on the findings of this survey, the experts overwinter