近年来,后季稻穗颈稻瘟发生严重,引起有关方面的重视,因此,对稻瘟病初侵染来源——病稻草上的稻瘟病菌分生孢子产生和萌发进行了观察,现介绍如下。材料和方法供试材料:1976～81年,先后采集各品种上的穗颈瘟样品,置室内真空干燥器保存。观察方法:将保存的样品取出,用自来水浸泡24小时,放在培养皿内的玻璃保湿架上,置恒温箱内培养。镜检分生孢子的产生情况;然后将穗颈瘟样品上产生的分生孢子用蒸馏水洗下,配制成100倍显微镜下每 In recent years, the late rice panicle Magnaporthe grisea serious, causing the attention of the parties concerned, therefore, the primary source of infection of rice blast - Pyricularia oryzae conidia on the germination and were observed as follows . MATERIALS AND METHODS Materials tested: 1976 ~ 81 years, has collected samples of various varieties of panicle head blast, home vacuum dryer to save. Observations: The samples were taken out, soaked in tap water for 24 hours, placed in a petri dish glass moisture rack, incubator incubator. Microscopic examination of the production of conidia; then panicle blast samples generated on conidia washed with distilled water, formulated as 100 times under the microscope