水稻黑条矮缩病主要是由灰飞虱传毒发生的水稻病毒病。受耕作制度、农田气候、虫源基数增多等多种因素的影响,该病在我县有逐年上升发展的趋势,成为我县水稻的突发性病害,是我县水稻生产上重要的病害之一,给我县水稻生产带来严重的威胁。1.危害症状水稻发生黑条矮缩病的主要症状是:植株矮缩丛生,分蘖增多,心 Rice black-streaked dwarf disease is mainly caused by the brown planthopper poisoning occurred in rice virus disease. Affected by the tillage system, farmland climate, the increase of insect base number and other factors, the disease in our county has a tendency of rising year by year, becoming a sudden disease of rice in our county is an important disease in rice production in our county First, to my county rice production poses a serious threat. 1. Harmful symptoms The main symptoms of black-streaked rice occurrence are: plant dwarf tufts, increased tillering, heart