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 | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Greb, Peggy / US Department of Agriculture |
Taille de l’image : | 2417 px × 3626 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |