近年来,灰飞虱在长江中下游、江淮、黄淮、环渤海湾等地发生基数异常偏高,带毒率不断上升,导致由其传播的水稻条纹叶枯病、黑条矮缩病和平方米粗缩病发生区域扩大、为害程度加重。为组织做好防 In recent years, Laodelphax striatellus has a high base anomaly in the middle and lower reaches of the Yangtze River, the Jianghuai, Huanghuai, Bohai Bay and other places, causing a rising incidence of virus-borne diseases, leading to rice stripe disease, black-streaked dwarf disease and Squamous area of ​​occurrence of large area expansion, increased degree of harm. Do well for the organization