| NOUN | plant | onion mildew, Peronospora destructor | fungus causing a downy mildew on onions |
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| Meaning | fungus causing a downy mildew on onions. | |
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| Synonym | Peronospora destructor | |
| Member of | Peronospora, genus Peronospora | genus of destructive downy mildews |
| Broader | downy mildew, false mildew | Any of various fungi of the family Peronosporaceae parasitic on e.g. grapes and potatoes and melons |
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