Diseases of truck crops Diseases of truck crops / Ralph E. Smith diseasesoftruckc119smit Year: 1940 16 California Agricultural Extension Service [Cm. 119 cross section. All the various plants of the beet family, including sugar beets, table beets, and Swiss chard, are affected by curly top. Many other kinds of plants are also susceptible, the most important being the tomato, in which the disease was first called 'western yellow blight.' For other > *i r f Fig. 7.—Charcoal rot of sugar beet. hosts, see 'Curly Top' (p. 91). Curly top is an extremely ease, being very abun
Diseases of truck crops Diseases of truck crops / Ralph E. Smith diseasesoftruckc119smit Year: 1940 16 California Agricultural Extension Service [Cm. 119 cross section. All the various plants of the beet family, including sugar beets, table beets, and Swiss chard, are affected by curly top. Many other kinds of plants are also susceptible, the most important being the tomato, in which the disease was first called 'western yellow blight.' For other > *i r f Fig. 7.—Charcoal rot of sugar beet. hosts, see 'Curly Top' (p. 91). Curly top is an extremely ease, being very abundant and destructive some years and again almost absent. The cause of the disease is a virus. As a rule it is more common in the warmer interior valleys and less troublesome in cool foggy districts near the coast. These facts are explained by the habits of the beet leaf-
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