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保定地区早春莲藕(Nelumbo mucifera Gaertn)大量腐烂,这主要是喙腐霉(Pythium rostratum Butl)和刺腐霉(Pythium spinosum Saw)引起的。经人工接种,证实黄瓜(Cucumis sativus L.)和西瓜(Citrullus vulgaus Schrad)也是喙腐霉和刺腐霉的寄主。本文报导了莲藕腐烂病的症状、病原菌的形态特征和生物学特性。
The early rotting lotus root (Nelumbo mucifera Gaertn) in Baoding area is largely decayed, mainly caused by Pythium rostratum butt and Pythium spinosum Saw. After inoculation, Cucumber (Cucumis sativus L.) and watermelon (Citrullus vulgaus Schrad) were also confirmed to be hosts of Pythium and B. juncea. This article reports the symptoms of lotus root rot, morphological characteristics and biological characteristics of pathogenic bacteria.