词汇 | downy-mildew |
释义 | downy mildew noun[ U ] uk /ˌdaʊ.ni ˈmɪl.djuː/ us /ˌdaʊ.ni ˈmɪl.duː/ a plant disease in which the backs of the leaves become yellow, because of attack from fungi(= organisms that get their food from decaying material or other living things): Usually farmers don't see downy mildew until late summer. The roses in these beds have had a history of downy mildew. Fungal diseases such as downy mildew can occur in wet, humid conditions and are spread by water splash and wind. Downy mildew usually appears well after cucumbers are harvested. Alliums may suffer from common onion problems such as downy mildew. Plant pathology anthracnose antifungal apple scab ash dieback auxin canker dry rot Dutch elm disease etiolated excrescence fungicidal fungicide leaf scorch leaf spot nodal organophosphate pesticide potato blight scald sterility Comparepowdery mildew |
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