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水稻是我国的主要粮食作物,近十多年来,由于两系稻杂交优质水稻、超级稻的推广面积不断增加,水稻病虫害发生种类、规律等都发生了变化,水稻主要病虫害种类也由原来的三虫两病(螟虫、稻纵卷叶螟、稻飞虱、纹枯病、稻瘟病)演变为三虫四病(增加了稻曲病和南方水稻黑条矮缩病)。近几年来,水稻病虫害发生整体偏轻。二化螟、稻纵卷叶螟、稻飞虱已连续三年中等偏轻发生,纹枯病发生严重,稻曲病零星发生,稻瘟病局
Rice is the main food crop in our country. In recent ten years, the varieties and rules of diseases and pests have changed due to the increasing popularization area of high-quality rice and super rice of two-line hybrid rice. The main pests and diseases of rice also changed from original Triadimena two diseases (stem borer, rice leaf roller, planthopper, sheath blight, blast) evolved into three insect four diseases (increased false smut and southern rice black-streaked dwarf disease). In recent years, the overall occurrence of rice pests and diseases light. Chilo suppressalis, rice leaf roller, rice planthopper has been moderately light for three consecutive years, severe occurrence of sheath blight, rice false smut sporadic, rice blast Bureau