23. 
24. 
THE CROWN-GALL AND HAIRY-ROOT OF THE APPLE TREE. 
. Hepecock, GeorGEeE G. The cross-inoculation of fruit trees and shrubs with 
crown-gall. Bulletin 131, pt. 3, Bureau b: Plant Industry, U. 8. Dept. of 
Agriculture, Mar., 1908, pp. 21-23. 
Some son tumors or knots on apple and quince trees. Circular 3, 
Bureau of Plant Industry, U.S. Dept. of AEE May, 1908, 16 pp. and | 
10 figs. 
Howarp, W. L. Experiments with crown-gall. Rept., Mo. State Hort. Soc., 
vol. 46, 1903, pp. 154-159; also Western Fruit Grower, vol. 14, 1904, pp. 112-113 
and 5 figs. 
5. Henprick, H. F. Orchard pests. Bulletin 55, Utah Agr. Expt. Sta., 1898, pp. 
157-168. 
. Isaac, J. Crown-gall. Rept., Cal. State Board Hort., vol. 8, 1902, pp. 77-80. 
. JacosBs. Root-knot. Rept., Cal. State Board Hort., vol. 4, 1894, p. 153. 
. JAEGER Jute. Ueber Kropfmaserbildung am Apfelbaum. Zeitschrift fiir 
Pflanzenkrankheiten, vol. 18, 1908, pp. 257-272 and pl. 7. 
. JoHNSOoN, W. G. Crown-gall. National Nurseryman, vol. 9, July, 1903, pp. 
68-69. 
. Kissa, N. W. Kropfmaserbildung bei Pirus malus sinensis. Zeitschrift fiir 
Pflanzenkrankheiten, vol. 10, 1900, pp. 129-132 and pls. 3 and 4. 
. Letone, B. M. Root-knot. Rept., Cal. State Board Hort., vol. 4, 1894, p. 313. 
. Mites, GeorGE F. Diseases of the apple tree and fruit. Crown-gall. Rept., 
Nebr. State Hort. Soc., vol. 34, 1903, p. 58. 
. Morris, O. M. Rept., Okla. Agr. Expt. Sta., vol. 14, 1905, p. 21. 
. Norton, J. B.S. Plant diseases in Maryland in 1902. Rept., Md. State Hort. 
Soc., vol. 5, 1902, pp. 92-93. 
Crown-gall. Circular Bulletin 42, Md. Agr. Expt. Sta., Mar., 1902, p. 
18 and fig. 10. 
. ——— Crown-gall. Circular Bulletin 51, Md. Agr. Expt. Sta., Mar., 1903, pp. 
1-3 and fig. 1. 
.——— Crown-gall. Circular Bulletin 56, Md. Agr. Expt. Sta., Apr. and May, 
1904, pp. 1-8 and pls. 1-5. 
. Pappock, WENDELL. Crown-gall. Bulletin 86, Colo. Agr. Expt. Sta., Dec., 
1903, 7 pp. and 2 pls. 
. Pammet, L. H. The crown-gall disease. Iowa State Register and Farmer, No. 
2713, May 10, 1907, p. 4. 
. Pours, J.L. Report of committee on injurious fungi. Crown-gall. Rept., 
Va. State Hort. Soc., vol. 6, 1902, pp. 145-148 and fig. 7. 
Distinguish between hairy or fibrous root gall and hard root gall. Na- 
tional Nurseryman, vol. 13, Sept., 1905, pp. 144-145 and fig. 1. 
Recent observations on crown-gall of apple. Special Circular ‘to Vir- 
ginia Nurserymen, Jan., 1907, 4 pp. 
Crown-gall of the apple—the scion largely responsible. National 
Nurseryman, vol. 25, Aug., 1907, p. 224. 
. PopENoE, E. A. The crown-gall in Kansas. Rept., Kans. State Hort. Soc., vol. 
27, 1903, pp. 134-137. 
Note on crown-gall. Western Fruit Grower, vol. 15, Jan., 1904, p. 25. 
. Pucstey, C. W. Diseases of the apple. Crown-gall. Rept., Nebr. State Hort. 
Soc., vol. 36, 1905, pp. 241-242. 
. Rrrzema-Bos, J. Wurzelkropf. Zeitschrift fiir Pflanzenkrankheiten, vol. 4, 
1894, p. 97. 
. SANDSTEN, E. P. Crown-gall. Rept., Wis. State Hort.Soc., vol 34, 1904, pp. 
132-137. 
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