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230问答网 > 请问黄芪白粉病发病症状，发病规律是什么？

请问黄芪白粉病发病症状，发病规律是什么？

2025-03-24 11:34:22

推荐回答（1个）

回答1：

初发病时叶正、背两面生白色粉状霉斑，叶柄、茎部染病也生白色霉点或霉斑，严重时整个叶片被白粉覆盖，致叶片干枯或全株枯死。
病菌以闭囊壳在病叶上越冬，翌春产生子囊孢子进行传播蔓延。此外在芽上越冬的菌丝，翌年也可发病。
供您参考

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