Curly top sugar beet infection. Close-up of a leaf of a sugar beet plant (Beta vulgaris) that has the disease curly top. This is a viral disease,usually caused by curtoviruses (genus Curtovirus). Symptoms include leaf curling and thickening of the veins and leaf | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Greb, Peggy / US Department of Agriculture |
Bildgröße: | 2417 px × 3626 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |