Mar. 19, 1917 
Dissemination of Angular Leafspot of Cotton 
473 
(2) In the case of the angular leafspot of cotton there is evidence of 
but little seed dissemination, though this is a probable factor in primary 
infection. 
(3) Insects play a very unimportant part in the spread of this disease. 
(4) Data have been obtained which point to the conclusion that wind¬ 
blown rain is an important factor. 
(5) The records of the United States Weather Bureau show that such 
an agency is possible. 
(6) Nothing in the literature precludes the assumption that such an 
agency may be effective in the dissemination of other similar diseases, 
while certain facts are on record which render it probable that this 
factor is of importance. 
(7) The control measures used in the case of diseases disseminated 
by the wind which require water for infection may be expected to serve 
satisfactorily for this type of disease. 
^ LITERATURE CITED 
Arthur, J. C., and Bolley, H. L. 
1896. Bacteriosis of carnations. Ind. Agr. Exp. Sta. Bui. 59, p. 17-39, 8 pi- (2 col.). 
Barss, H. P. 
1913. Cherry gummosis. A preliminary report. In Oreg. Agr. Exp. Sta. Bien. 
Crop Pest and Hort. Rpt., 1911/12, p. 198-217, fig. 10-19. 
1915. Bacterial gummosis or bacterial canker of cherries. In Oreg. Agr. Exp. Sta. 
2d Bien. Crop Pest and Hort. Rpt., 1913/14, p. 224-240, figs. 13-19. 
Beach, S. A. 
1893. Bean blight. In N. Y. State Agr. Exp. Sta. nth Ann. Rpt. 1892, p. 553- 
SS5- fi g- 8- 
Boyer, G., and Lambert, F. 
1893. Sur deux nouvelles maladies du Mfirier. In Compt. Rend. Acad. Sci. 
[Paris], t. 117, no. 8, p. 342-343- 
Brown, Nellie A., and Jamieson, Clara O. 
1913. A bacterium causing a disease of sugar-beet and nasturtium leaves. In 
Jour. Agr. Research, v. 1, no. 3, p. 189-210, pis. 17-19 (1 col.). 
Edgerton, C. W. 
1912. The rots of the cotton boll. La. Agr. Exp. Sta. Bui. 137, 113 p., 13 pi. 
-and Moreland, C. C. 
1913. Bean blight and preservation and treatment of bean seed. La. Agr. Exp. 
Sta. Bui. 139, 43 p., 6 pi. 
Griffin, F. L. 
1911. A bacterial gummosis of cherries. In Science, n. s. v. 34, no. 879, p. 615-616. 
Halsted, B. D. 
1893. A bacterium of Phaseolus. In N. J. Agr. Exp. Sta. 13th Ann. Rpt. 1892, p. 
283-285, illus. 
Hasse, Clara H. 
1915. Pseudomonas citri, the cause of citrus canker. A preliminary report. In 
Jour. Agr. Research, v. 4, no. 1, p. 97-100, pi. 9-10. 
Heald, F. D. 
1915. Preliminary note on leaf invasions by Bacillus amylovorus. Wash. Agr. 
Exp. Sta. Bui. 125, 6 p., 3 fig. 
