UNITED STATES DEPARTMENT OF AGRICULTURE 



MISCELLANEOUS PUBLICATION No. 168 



Issued November 1933 

 WASHINGTON, D. C. Revised November 1951 



MARKET DISEASES OF FRUITS AND VEGETABLES: 

 APPLES, PEARS, QUINCES * 



By Dean H. Rose, formerly senior physiologist, L. P. McColloch, associate 

 pathologist, and D. F. Fisher, formerly principal horticulturist, Division 

 of Handling, Transportation, and Storage of Horticultural Crops, Bureau 

 of Plant Industry, Soils, and Agricultural Engineering, Agricultural Re- 

 search Administration 



1 This publication is a revision of the third in a series called "Market 

 Diseases of Fruits and Vegetables." The series is designed to aid in the recog- 

 nition and identification of pathological conditions of economic importance 

 affecting fruits and vegetables in the channels of marketing, in order to 

 facilitate the market inspection of these food products and to prevent losses 

 from such conditions. The Latin names of causal fungi and the authorities 

 therefor are in accordance with the International Rules of Botanical Nomen- 

 clature. The names of the insects mentioned are those approved for general 

 use by the American Association of Economic Entomologists (91). 



The statements regarding fruit injuries caused by insects are made with 

 the approval of the Bureau of Entomology and Plant Quarantine. B. A. 

 Porter, of that Bureau, collaborated with the authors in the preparation of 

 the entomological portions of the bulletin. 



Most of the colored plates are reproduced from color photographs taken 

 by Lillian A. Guernsey, of the Bureau of Plant Industry, Soils, and Agri- 

 cultural Engineering. Some reproductions are from water-color paintings 

 made by the late L. C. C. Krieger and the late R. C. Steadman, formerly 

 of this Bureau, and from colored photographs prepared through the collab- 

 oration of Webster Bros., Chicago, 111. The color photograph of internal 

 cork (pi. 4, F) was furnished through the courtesy of A. B. Burrell, Depart- 

 ment of Plant Pathology, Cornell University. 



The plates are arranged so that the diseases and injuries of each kind of 

 fruit are shown as far as possible in the order of their occurrence — in the 

 orchard, during washing, packing, storage, and transit, and on the market. 

 Occasionally similar diseases or injuries that occur at other stages in the 

 sequence of development are included for comparison. 



The original (1933) version of this publication was prepared by Dean H. 

 Rose, Charles Brooks, the late D. F. Fisher, and the late C. O. Bratley, all 

 formerly of this Bureau. 



