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一、发生与危害情况稻曲病是一种严重危害水稻穗粒的真菌病害,它广泛分布于日本,印度和中国等30多个国家。国内以苏、浙、赣和湘等省发生较重。七十年代以前,我省仅丹东地区零星发生,现已蔓延全省各稻区,成为辽宁水稻的主要病害之一。1984年省内调查,稻曲病的发病面积达300多万亩,占水稻种植面积的43％。病穗率一般为5～10％,严重地块达30％。1985年比1984年发生面积更大,危害也更严重。据省农科院调查,辽粳5号发病穴率68.4％,发病穗率9.8％;杂交粳稻发病穴率58％,发病穗率6.2％;中花9号发病穴率44％,发病穗率10.6％。辽宁省锦县右卫乡水稻发病面积占水稻种植面积的55％,其它如鞍山、营口、
First, the occurrence and damage False disease is a serious damage to rice ear fungus disease, which is widely distributed in Japan, India and China more than 30 countries. Domestic to Jiangsu, Zhejiang, Jiangxi and Hunan provinces heavier. Before the seventies, the province only Dandong area sporadic, now spread across the province rice area, Liaoning rice has become one of the major diseases. In 1984, the province’s investigation, the incidence of false smut disease area of about 3000000 acres, accounting for 43% of rice acreage. Disease panicle rate is generally 5 to 10%, a serious block up to 30%. The area was larger and harmed in 1985 than in 1984. According to the investigation of the Provincial Academy of Agricultural Sciences, the incidence rate of Liaojing 5 was 68.4%, and the incidence of spikes was 9.8%. The incidence of hybrid japonica rice was 58%, and the incidence of spikes was 6.2%. The incidence rate of spikes in Zhonghua 9 was 44% 10.6%. Right Weijiang Township, Liaoning Province, the incidence of rice accounted for 55% of the area planted to rice, others such as Anshan, Yingkou,