对头炭疽病的初侵染源和田间发生规律进行了试验研究，其结果表明：头炭疽病的初侵染源主要是散落在田间的病残体和带病种茎，头２叶１心时就能发病。病害的消长与气象因子有密切的关系，一般温度１３～２５℃、相对湿度８０％以上的气候条件有利于发病；连作、地势低洼、长期积水等情况发病严重，砂质壤土和粘性稻土病情重于丘陵红壤土。 The results showed that the primary sources of anthracnose anthropoid infection were mainly the diseased and the diseased stems scattered in the field, the first 2 leaves and 1 heart Will be able to onset. The growth and decline of diseases are closely related to meteorological factors. Generally, climatic conditions with temperature of 13-25 ℃ and relative humidity of more than 80% are conducive to the onset of disease; and continuous cropping, low-lying and long-term waterlogging are severely affected. The sandy loam and clay soil Disease is heavier than the hilly red soil.