LITERATURE CITED 
(1) Beach, W. S. 
1919. Biologic specialization in the genus Septoria. In Anier. Jour. 
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(2) Beinhart, E. G. 
1918. Steam sterilization of seed beds for tobacco and other crops. 
U. S. Dept. Agr., Farmers' Bui. 996, 15 p., illus. 
(3) Duggab, B. M. 
1913. Lycopersicin, the red pigment of the tomato, and the effect 
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1, p. 22-45. 
(4) Hanson, James. 
1921. Tomato color. In Canner, v. 52, no. 4, p. 35-36. 
I 5 t Noeton, J. B. S. 
1917. Host limitations of Septoria lycopersici. (Abstract.) lit 
Phytopathology, v. 7, p. 65. 
(6) Peitchaed, F. J. 
1922. Development of wilt-resistant tomatoes. U. S. Dept. Agr. Bui. 
1015, 18 p., illus. 
(7) and Claek. W. B. 
1918. The control of tomato leaf-spot. U. S. Dept. Agr., Bur. Plant 
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(8) 1919. Effect of copper soap and of Bordeaux soap spray mixtures 
on control of tomato leaf spot. In Phytopathology, v. 9. p. 554-564, 
illus. 
(9) and Pokte, W. S. 
1921. Relation of horse nettle ( Solanum carolinense) to leaf-spot 
of tomato (Septoria lycopersici). In Jour. Agr. Research, v. 21. 
p. 501-506, illus. 
(KM 1921. Use of copper soap dust as a fungicide. In Phytopathology, 
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(11) L921. Effect of fertilizers and lime on control of tomato leaf spot 
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(12) 1923. The relation of temperature and humidity to tomato leaf-spot 
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illus. 
(13) S afford, W. E. 
1921. Synopsis of the genus Datura. /// Jour. Wash. Acad. S<i.. 
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(14) L921. Datura — an inviting genus for the study of heredity. In Jour. 
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