恶苗病在六安市原先主要以双季晚稻发病较重,因为双季晚稻整个生长期都处在高温高湿的环境下,而高温高湿是水稻恶苗病发生发展的必要条件。但是,近年来,随着该病侵染源的逐年增加,加之六安市杂交中稻薄膜育秧面积的逐年扩大,中稻秧田恶苗病的发生有加重之势,且一旦发病,病情发 The origin of the disease was mainly heavier in late-season double cropping rice in Lu’an City, which was under the condition of high temperature and high humidity throughout the whole growing season of double cropping rice, and the high temperature and high humidity were the necessary conditions for the occurrence and development of rice Bakanae disease. However, in recent years, with the increasing of the source of infection and the growing area of ​​the hybrid rice thin film in Lu’an City every year, the occurrence of the ill seedling disease in the mid-rice seedling is aggravated. Once the disease occurs,