这个词是什么意思？
A genus of destructive parasitic OOMYCETES in the family Peronosporaceae, order Peronosporales, affecting numerous fruit, vegetable, and other crops. Differentiation of zoospores usually takes place in the sporangium and no vesicle is formed. It was previously considered a fungus.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D010838 · MeSH 2026。
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