Powdery Mildew : 無料・フリー素材/写真
Powdery Mildew / The Cornell IPM Image Gallery
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
|---|---|
| 説明 | Powdery mildew forms a white to gray, fungal coating on the above-ground parts of the plant. Lower leaves are usually the most severely infected because of the high humidity in the lower canopy. As disease lesions age small black fruiting bodies (cleistothecia) develop with in white infected areas. Powdery mildew is favored by wet and humid days with moderate temperatures of 600 F or above. Powdery mildew is disseminated by airborne spores. |
| 撮影日 | 2014-06-16 23:26:59 |
| 撮影者 | The Cornell IPM Image Gallery , New York, USA |
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| カメラ | Canon PowerShot SX50 HS , Canon |
| 露出 | 0.003 sec (1/320) |
| 開放F値 | f/4.0 |
| 焦点距離 | 16393.44262 dpi |