HAWAII AGRICULTURAL EXPERIMENT STATION, HONOLULU. 
[Under the supervision of A. C. True, Director of the States Relations Service. United 
States Department of Agriculture.] 
E. W. Allen, Chief of Office of Experiment Stations. 
Walter H. Evans, Chief of Division of Insular Stations, Office of Experiment 
Stations. 
STATION STAFF. 
J. M. Westgate, Agronomist in Charge. 
J. Edgar Higgins, Horticulturist. 
F. G. Krauss, Superintendent of Extension Work. 
C. W. Carpenter, Plant Pathologist. 
Wallace Macfarlane, Specialist in Soil Fertility 
Investigations. 
K. A. Ching, Assistant Chemist. 
H. L. Chung, Assistant in Agronomy. 
R. A. Goff, In Charge of Glenioood Substation. 
LETTER OF TRANSMITTAL. 
Hawaii Agricultural Experiment Station, 
Honolulu, Hawaii, October 25, 1918. 
Sir: I have the honor to submit herewith and to recommend for publication 
as Bulletin No. 45 of the Hawaii Agricultural Experiment Station a paper en- 
titled "Potato Diseases in Hawaii and Their Control," by C. W. Carpenter, 
pathologist of the station. The potential as well as actual importance of the 
potato industry in the Hawaiian Islands makes the present paper both timely 
and valuable. The absence of cold winter weather, together with the almost 
continuous cultivation of patches to potatoes throughout the year in most sec- 
tions, makes the problem of control of potato diseases much more difficult than 
in the mainland of the United States. 
Respectfully, 
J. M. Westgate. 
Agronomist in Charge. 
Dr. A. C. True, 
Director States Relations Service, 
U. S. Department of Agriculture, Washington, D. C. 
Publication recommended. 
A. C. True, Director. 
Publication authorized. 
D. F. Houston, 
Secretary of Agriculture, 
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