1952年应用有机汞剂防治稻瘟病,取得了划时代的效果,但经过几年后,全国各地反映,即使撒布有机汞剂,也不能防治谷壳变色或穗的枯损.因此,认为在以往被当做穗稻瘟病的,实际上是否有很多稻瘟病以外的原因?这种症状曾经叫做变色穗、变色谷、穗枯症或者稻瘟病类似症等,但木谷等提议把这些统称为“穗枯”.关于穗枯的原因,各地的研究单位已经作出了解释,但就全国来说,有许多论点还不够清楚,部分论点也混乱.因此,作者为探明穗枯的原因和明确诊断方法,以主要病因胡麻叶斑病为对象,针对发生生态、品种抗病性机制和防治方法,进行了系统研究. In 1952, organo-mercuric agents were used to control rice blast and achieved epoch-making results. However, after several years, the whole country has reported that even the organic mercury agent can not prevent the discoloration of the chaff or the loss of the spikes. Therefore, As a result of ear blast, in fact there are many reasons other than blast? This kind of symptom was once called discoloration, discoloration, panicle disease or blast disease and other similar diseases, but Wood Valley proposed these collectively referred to as “panicle” As for the causes of head wilt, research institutes all over the world have already made explanations, but as far as the whole country is concerned, many of the arguments are not yet clear enough and some of the arguments are chaotic. Therefore, in order to find out the cause of ear damage and to make a clear diagnosis, The main etiology of flax leaf spot as the object, for the occurrence of ecological, disease resistance mechanisms and prevention methods, a systematic study.