 This hypothesis is conceivable because the first description of the beet leafhopper on sugar beets was made from the western slope of Colorado in 1895 by C. P. Gillette and C. F. Baker.As early as 1905, E. D. Ball suspected the beet leafhopper in the spread and development of sugar beet curly top disease in Utah.However, he did not attribute the appearance of the disease to any viral or pathogenic entity, figuring that the damage was directly caused by the feeding injury induced by the insect.