. Bulletin of the Department of Agriculture. Agriculture; Agriculture. BULLETIN No. 1104 JUf^'^^U. Washington, D. C. October 23, 1922 INTERNAL BROWNING OF THE YELLOW NEWTOWN APPLE/ By W. S. Ballabd, Plant Pathologist, Office of Fruit-Disease Investigations, and J. R. Magness and Lon A. Hawkins, Plant Physiologists, Office of Horticul- tural and Pomological Investigations, Bureau of Plant Industry. CONTENTS. Page. History of the investigations 1 Description of internal browning— 4 Experimental work 6 Relation of internal browning to storage conditions 8 Relation of internal browning to orc
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. BULLETIN No. 1104 JUf^'^^U. Washington, D. C. October 23, 1922 INTERNAL BROWNING OF THE YELLOW NEWTOWN APPLE/ By W. S. Ballabd, Plant Pathologist, Office of Fruit-Disease Investigations, and J. R. Magness and Lon A. Hawkins, Plant Physiologists, Office of Horticul- tural and Pomological Investigations, Bureau of Plant Industry. CONTENTS. Page. History of the investigations 1 Description of internal browning— 4 Experimental work 6 Relation of internal browning to storage conditions 8 Relation of internal browning to orchard conditions 12 Relation of internal browning to soil fertility and fertilizers 14 Page. Experimental work—Continued. Relation of internal browning to the individual tree 16 Defoliation and girdling ex- periments 17 R6sum6 of factors conducive to internal browning 22 Conclusion 23 Summary 23 HISTORY OF THE INVESTIGATIONS. It has been recognized for a number of years that certain apples grown under particular climatic conditions and held in cold storage at temperatures around 32° F. are liable to develop a peculiar brown- ing of the tissue of the fruit. This trouble has no external symp- toms and can not be detected from the outside of the fruit. It was first brought to the attention of investigators of the Bureau of Plant Industry during the storage season of 1905-6. In the fall of 1905 a series of storage experiments with apples from various sections of California was begun under the direction of G. Harold Powell. On examination of the fruit in the spring of 1906, apples from the Pa- jaro Valley were found to be affected by this premature browning of the flesh, which was designated as internal browning. 1 This bulletin reports the results of cooperative work between the Offices of Fruit- Disease Investigations and Horticultural and Pomological Investigations of the Bureau of Plant Industry. C. W. Mann, E. M. Harvey, and H. R. Kraybill, formerly members of the staff of
Size: 1706px × 1464px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauth, bookcentury1900, bookdecade1910, booksubjectagriculture
