采用田间空中孢子捕捉方法证明稻曲病菌孢子在田间具有气流传播的能力。种子和土壤带菌不可能是田间的主要初侵染源，萌发的黑色厚垣孢子是主要的初侵染源。在稻田外可能有适合于稻曲病菌黑色厚垣孢子休眠，并能在翌年夏季打破休眠、诱导萌发的菌源基地或中间寄主 Field aerial spore catching method was used to prove that the spores of Y. tomentosa had the ability to spread air currents in the field. Implantation of seeds and soil can not be the primary source of initial invader in the field. Germinating black chlamydospores are the primary sources of initial infection. Outside the paddy field, there may be suitable for dormancy of black chlamydia sp. Of Aspergillus oryzae and break dormancy in the summer of next year to induce the germination of the bacterial source base or intermediate host