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一九七五年我县大面积晚稻发生严重穗枯。除穗颈发病以外,主要表现是枝梗枯。据十一月中旬全县晚稻大面积普查:晚稻穗枯平均发病指数高达16.7,比一九七四年5.56,一九七三年2.75,一九七二年1.69,增加3～9倍,为近几年来发病最严重的一年。去年,我们对病谷进行培养镜检,发现病谷中除少量由粒黑粉病感染外,绝大多数都是由胡麻斑病致病的。随后,对不同地区的晚稻,分成穗轴、枝梗、谷粒三部分进行培养检查,从大量病穗
In 1975, a serious panicle occurred in a large area of late rice in our county. In addition to the incidence of panicle, the main performance is stems and stems dry. According to a large area survey of late rice in mid-November in the county, the average incidence index of late-heading rice spikes reached 16.7, an increase of 3 to 9 times from 5.56 in 1974, 2.75 in 1973 and 1.69 in 1972, In recent years the incidence of the most serious year. Last year, we carried out microscopic examination of the diseased valley and found that most of the diseased cereal grains were caused by the yellow spot disease, except for a small amount of infection by the granulosis. Subsequently, different regions of late rice, divided into cob axis, branch stems, grain three parts of the culture examination, from a large number of sick ear