Chlorosis has been associated with iron deficiency for many years, particularly for cane, vine, and tree crops. Thus far, however, a chlorosis due to iron deficiency has not been observed for sugar beets under field conditions in the United States. Nevertheless, symptoms can be readily produced in sugar beets under greenhouse conditions when iron is omitted from the nutrient solution. Symptoms appear very quickly when young seedlings are transferred to iron-free solutions, or when iron is withheld from older plants. The younger leaves change from green, to light green, and, finally, to a light, uniform yellow. The veins remain green at first, but finally they, too, become bleached. As the symptoms progress in the new leaves, older leaves are also gradually affected by the same pattern of chlorosis. Eventually, the bleached blades become necrotic, which causes them to cup upward. If iron is reabsorbed before the blade tissues become permanently damaged, the fine veins become green and prominently netted. This is the symptom that is normally associated with iron deficiency and is actually a recovery symptom.