TABLE 25.-Exports of apples from the United States, by months, 1918-19 to 1923-24 RECENT FEDERAL PUBLICATIONS ON THE MARKETING, TRANSPORTATION, AND STORAGE OF BARRELED APPLES BROOKS, CHARLES, and others. 1923. APPLE SCALD AND ITS CONTROL. U. S. Dept. Agr. Farmers' Bul. 1380. and others. 1922. DISEASES OF APPLES IN STORAGE. U. S. Dept. Agr. Farmers' Bul. 1160. ROSE, D. H. 1924. DISEASES OF APPLES ON THE MARKET. A statistical study based on certificates issued by the food products inspection service of the Bureau of Agricultural Economics during the period from November 1, 1917, to July 1, 1921. U. S. Dept. Agr. Bul. 1253. SCOTT, W. M., and others. 1919. PREPARATION OF BARRELED APPLES FOR MARKET. U. S. Dept. Agr. Farmers' Bul. 1080. U. S. DEPT. AGR. 1925. CARLOAD SHIPMENTS OF FRUITS AND MELONS FROM STATIONS IN THE UNITED STATES FOR THE CALENDAR YEARS 1920, 1921, 1922, AND 1923. Statis. Bul. 8. U. S. DEPT. AGR. 1924. OFFICIAL STANDARDS FOR THE INSPECTION OF BARRELED APPLES. Amendment No. 1 to S. R. A. No. 85. U. S. DEPT. AGR. 1925. RULES AND REGULATIONS OF THE SECRETARY OF AGRICULTURE VEGETABLES, AND OTHER PRODUCTS. S. R. A. 93-Agricultural U. S. DEPT. AGR. 1925. SHIPMENTS AND UNLOADS OF CERTAIN FRUITS AND VEGETABLES, 1918-1923. Statis. Bul. 7. Publications of the U. S. Department of Agriculture available for free distribution only have been included. istration__. Solicitor___ Weather Bureau__ Bureau of Agricultural Economics- Bureau of Plant Industry.. Forest Service - - Bureau of Chemistry - Bureau of Entomology Bureau of Biological Survey- Fixed Nitrogen Research Laboratory - Federal Horticultural Board. Packers and Stockyards Administration__. W. M. JARDINE. R. W. DUNLAP. WALTER G. CAMPBELL. NELSON ANTRIM CRAWFORD. W. W. STOCKBERGER. E. W. NELSON, Chief. THOMAS H. MACDONALD, Chief. C. W. LARSON, Chief. F. G. COTTRELL, Director. C. B. SMITH, Chief. GEORGE L. PELTIER, formerly Plant Pathologist, C. J. KING, Associate Agronomist DEPARTMENT BULLETIN No. 1417 Washington, D. C. August, 1926 OZONIUM ROOT ROT By GEORGE L. PELTIER, formerly Plant Pathologist,' C. J. KING, Associate Agronomist, Office of Cotton, Rubber, and Other Tropical Plants, Bureau of Plant Industry, and RAYBURN W. SAMSON, Student Assistant, Department of Plant Pathology, Nebraska Agricultural Experiment Station 2 PART I.-STUDIES OF OZONIUM ROOT ROT IN ARIZONA AND TEXAS By GEORGE L. PELTIER and C. J. KING INTRODUCTION Root rot caused by the fungus Ozonium omnivorum Shear is a disease occurring in certain sections of the Southwest. It attacks a great variety of plants, but primarily affects cotton, alfalfa, and fruit and ornamental trees. In spite of the fact that root rot has 1 Plant Pathologist, Nebraska Agricultural Experiment Station; Plant Pathologist, Bureau of Plant Industry, from June 14 to Sept. 13, 1924. The senior writer wishes to acknowledge the assistance of George T. Ratliffe, associate agronomist, Office of Western Irrigation Agriculture, Bureau of Plant Industry, who placed at his disposal all the facilities of the United States San Antonio Field Station, San Antonio, Tex., including all the data and photographs collected since 1916 on Ozenium root rot. The writers also wish to thank H. F. Loomis, junior agronomist, Office of Cotton, Rubber, and Other Tropical Plants, Bureau of Plant Industry, for some of the photographs reproduced in this bulletin." 92792-26-1 1 |