通过1974～1978年的试验证明:麦类赤霉病菌[Gibberella zeae(Schw.)Perch.)的两种孢子,随病残体置于淹水条件下,经18—20天全部失去其发芽力。病菌在以三麦—早稻—后季稻三熟制为主的上海地区,不能在早稻、后季稻水田中越夏越冬,或麦收后侵入水稻,稻收后以菌丝体在稻桩内潜伏越冬。引起稻桩上春季产生麦赤霉病菌子囊壳的初次菌源,不是传自腐生在稻田土表的病菌菌丝体,而主要是来自混在播种材料中的带病麦粒。 The test from 1974 to 1978 proved that two kinds of spores of Gibberella zeae (Schw.) Perch. Were placed under flooding conditions and all of them lost their germination ability after 18-20 days . In Shanghai, which is dominated by Sanmai-early rice-post-season rice, it can not invade the rice in the early and late rice paddy fields in mid-summer and summer, Winter. The primary source of rice germ caused by Gibberella zeae during the spring was not the mycelia of bacteria that were self-destructed in the soil surface of paddy field but mainly the diseased grains mixed with the sowing material.