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一、前言长安地区种植水稻有着悠久的历史,水稻所感染的病害达十余种,其中以稻瘟病、稻胡麻斑病、纹枯病较为严重。1956年8、9月我们曾对水稻纹枯病做了初步调查,植株平均发病率在19%,最高达84—98%,而以新推广的银坊粳稻受害最重。由于此病为害,该年损失在8%以上。该病也广泛的分布于陕南汉中、城固及西乡县等地区,造成一些水稻卫星田的倒伏,因此,是很值得我省重视的一个病害。57～58年又继续作了调查,现将三年来在长安杜曲、韦曲等地所观察到的一些情况初步整理出来,以供参考。
I. Introduction The Chang’an area has a long history of planting rice. The diseases infected by rice have reached more than ten species, of which rice blast, paddy spot and sheath blight are more serious. In August and September 1956, we conducted a preliminary survey of rice sheath blight. The average incidence of plants was 19%, reaching a maximum of 84-98%, while the newly popularized Silver Fang Japonica suffered the most. Due to the disease damage, the loss in the year more than 8%. The disease is also widely distributed in Hanzhong, Chenggu and Xixiang County in southern Shaanxi, causing some lodging of rice satellite fields, therefore, it is a disease worthy of our attention. 57 to 58 years to continue to investigate, now three years in Chang’an Du Qu, Wei Qu and other places observed some of the initial situation for reference.