. Bulletin of the Department of Agriculture. Agriculture; Agriculture. Contribution from the Bureau of Plant Industry WM. A. TAYLOR, Chief. Washington, D. C. PROFESSIONAL PAPER March 6, 1920 EFFECT OF TEMPERATURE ON THE RESISTANCE TO WOUNDING OF CERTAIN SMALL FRUITS AND By Lox A. Hawkins, Plant Physiologist, and Charles E. Sando, Junior Chemist, Office of Horticultural and Pomological Investigations. CONTENTS. Page. Experimental work Description of the method employed. Conditions of the tests. Discussion oi EXPERIMENTAL WORK. Precooling, that is, cooling down rapidly
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. Contribution from the Bureau of Plant Industry WM. A. TAYLOR, Chief. Washington, D. C. PROFESSIONAL PAPER March 6, 1920 EFFECT OF TEMPERATURE ON THE RESISTANCE TO WOUNDING OF CERTAIN SMALL FRUITS AND By Lox A. Hawkins, Plant Physiologist, and Charles E. Sando, Junior Chemist, Office of Horticultural and Pomological Investigations. CONTENTS. Page. Experimental work Description of the method employed. Conditions of the tests. Discussion oi EXPERIMENTAL WORK. Precooling, that is, cooling down rapidly to a refrigerating tem- perature either before or immediately after fruit is placed in cars for shipment, has resulted in appreciable savings hi the shipment of perishable fruits. Powell2 has shown that the precooling of oranges rendered them less susceptible to decay. He has also shown that fruit even slightly injured is much more liable to fungous infection and decay than sound fruit. Ramsey3 comes to much the same conclusion as regards the ship- ment of red raspberries from the Puyallup Valley. Stevens and Wilcox,4 working with strawberries, showed that RKizopus nigricans Ehrenb., which causes much of the decay of this fruit in transit, could not infect unwounded berries and that less infection occurred when the berries were properly cooled and refrigerated until they reached the market. - 1 This bulletin gives the result of a portion of the work carried on under the project "Factors Affect- ing the Storage Life of ; 2 Powell et-al. The decay of oranges while in transit from California. U. S. Dept. Agr., Bur Plant Indus. Bui. 123, 79 p., illus. 1908. 3 Ramsey, H. J. Factors governing the successful shipment of red raspberries from the Puyallup Valley IT. S. Dept. Agr. Bui. 274, 37 p., illus. 1915. « Stevens, Neil E., and Wilcox, R. B. Rhizopus rot of strawberries in transit. U. S. Dept. Agr. Bui. 531, 22 p. Literature cited, p. 21-22. 1917. 152340°—20
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