PREFACE 



The demand for cacao products has greatly increased during the twentieth century. At the same 

 time diseases and pests have threatened one after another of the cacao-producing areas of the world. It 

 has therefore become essential to reexamine every factor which might have a bearing on the problem of 

 maintaining and increasing production, whether by improvement of methods, by seeking remedies for spe- 

 cific ills, or by finding areas suitable for new plantings. In addition to experiments and research conduct- 

 ed by governmental and private agencies in the various cacao-growing countries, broad programs of re- 

 search under cooperative sponsorship were undertaken as early as 1930 at the Imperial College of Trop- 

 ical Agriculture, Trinidad, and more recently at the West African Cacao Research Institute, Tafo, Gold 

 Coast, and the Inter-American Institute of Agricultural Sciences, Turrialba, Costa Rica. 



This bibliography is intended to serve students, research workers, and others concerned with 

 the problems involved in growing healthy and productive cacao trees and in processing the beans to meet 

 the standards set by manufacturers of cocoa and chocolate. It includes, in addition to general material on 

 the culture of cacao in various parts of the world and certain special aspects of culture, references on the 

 botany and pathology of the plant, its insect and other enemies, and both practical and scientific aspects of 

 the primary processing of the cacao bean. It does not include material dealing chiefly with the processing 

 and sale of cacao products outside the country of origin, or items of interest primarily to the historian. 

 With only a few exceptions the bibliography is limited to holdings of the U. S. Department of Agriculture 

 Library and published during the period 1920 to 1949. Call numbers following the citations are those of 

 the Library. 



Photoprint and Microfilm Copies 



Photoprint or microfilm copies of publications in the U. S. Department of Agriculture Library 

 may be obtained at the following prices: 



Photoprints: $1.00 for each 10 pages or fraction thereof from a single 

 article or book. 



Microfilms: $1.00 for each 50 pages or fraction thereof from a single i 



article or book. 



Enclose with order payment in cash, library coupon, check, or money order drawn to the 

 Treasurer of the United States. U. S. Department of Agriculture Library coupons valued at $1.00 each 

 may be ordered in any quantity. 



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