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(一)稻粒黑穗病菌厚垣孢子的正常萌发,在外界环境條件的關係上,不僅要求一定的光照,而且需有充分的氧氣供給。至於對水分的要求,只要空氣中?窒喈敐穸?已足供萌发的需要,不一定要有水滴的經常存在。(二)接種試驗證明病原係在水稻的灌漿期侵入種实。在自然界中,這種侵染顯然是通過氣流傳播而實现的。但種子與土壤所荷带的病原菌厚垣孢子,都是侵染的來源。(三)过量的氮素肥料,與高的稻粒黑穗病感染率有密切的關係。(四)稻粒黑穗病发生程度的年份间差異可能主要是决定於抽穗至乳熟期的高濕度的持續時間。(五)初步調查的資料表示水稻品種间具有顯著的感病性差別。
(A) of rice ear smut bacteria Chlamydospore normal germination, the external environmental conditions in the relationship, not only require a certain amount of light, but also need to have adequate oxygen supply. As for the water requirements, as long as the air? Suffer water? Suffer? Sufficient for germination needs, do not necessarily have the frequent existence of water droplets. (B) Inoculation test proves that the pathogen invades the seed during the filling stage of rice. In nature, this infestation is apparently achieved by airborne transmission. However, the pathogen chlamydospores that are carried by seeds and soil are the sources of infection. (C) excessive nitrogen fertilizer, and high grain smut infection rates are closely related. (IV) The difference in years between the occurrence of rice smut may mainly depend on the duration of high humidity from heading to milk ripening. (E) The preliminary survey data show that there is a significant difference in susceptibility between rice varieties.