Organic lettuce farming. Organic romaine lettuce (Lactuca sativa longifolia) growing during a field trial in which Alyssum sp. plants (white flowers) have been planted among the lettuce in order to control aphids. Alyssum plants attract hoverflies, a natural predator of aphids. Photographed in Salinas, California, USA. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Ausmus, Stephen / US Department of Agriculture |
Bildgröße: | 3750 px × 2500 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |