１９９８年全国主要农作物病虫发生趋势预报（全国农业技术推广服务中心北京１０００２６去冬以来，北方大部地区持续干旱，气温偏暖，南方麦区降水异常偏多，气温偏低，这些对南北方作物病虫害越冬均产生了较明显的影响。随着气温的回升，越冬病虫逐渐开始复苏，小麦病虫... Pest and disease occurrence prediction of major crops in China (National Agricultural Technology Extension Service Center, Beijing 100026, China) Since the winter of last winter, the northern part of China continued to suffer from drought, the temperature was warmer, the precipitation in the southern wheat area was abnormally high and the temperature was low. Crop pests and diseases overwinter have had a more significant impact. With the temperature rise, overwintering pests and gradually began to recover, wheat pests ...