Diseases of economic plants (1910) Diseases of economic plants diseasesofeconom02stev Year: 1910 308 DISEASES OF ECONOMIC PLANTS The wilting of the foliage and the blackening of the bun- dles are distinctively A soil bearing diseased plants one season is subject to the malady in succeeding years and must be abandoned for tomato culture. The disease is spread from plant to plant largely by the potato bug (Colorado beetle) and other Fig. 134. — Tomato field showing effect of wilt (bacillose). Original. insects. For this reason all leaf-infecting insects should be given spec
Diseases of economic plants (1910) Diseases of economic plants diseasesofeconom02stev Year: 1910 308 DISEASES OF ECONOMIC PLANTS The wilting of the foliage and the blackening of the bun- dles are distinctively A soil bearing diseased plants one season is subject to the malady in succeeding years and must be abandoned for tomato culture. The disease is spread from plant to plant largely by the potato bug (Colorado beetle) and other Fig. 134. — Tomato field showing effect of wilt (bacillose). Original. insects. For this reason all leaf-infecting insects should be given special attention. Otherwise this disease in symp- toms, cause, dissemination, and treatment is similar to the usual soil diseases. Wilt, fusariose (Fusarium sp.). — A form of fusariose has been described in California by Smith2 as follows: It occurs not infrequently as the cause of losses up to 100 1 Smith, E. F., Dept. Agr. Div. Veg. Phys. & Path. Bui. 12, De- cember 19, 1896. 2 Smith, R. E., Cal. Agr. Exp. Sta. Bui. 175, January, 1906.
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