HAWAII. 97 



bring success to the planter. The cordial cooperation of the local 

 authorities in furthering the station's work has aided materially in 

 the attempt to improve the agricultural condition of the island. 



HAWAII. 

 Hawaii Agricultural Experiment Station, Honolulu. 



Under the supervision of A. C. True, Director, Office of Experiment Stations, 

 United States Department of Agriculture. 



E. V. Wilcox, Ph. D., Special Agent in Charge. 



The new office building, provided for from Territorial funds and 

 serving exclusively for the library, general office, and office of the 

 entomologist, was occupied during the year. Quarters for the 

 agronomist were provided in one portion of the old office building, 

 which was completely remodeled to accommodate the work of the 

 departments of chemistry and agronomy. 



The portion of the ground turned over to the Department of 

 Agriculture by the Navy Department, which is situated on Magazine 

 Hill, was cleared and planted to corn, cotton, and broom corn, and 

 considerable success was obtained with corn, particularly with the 

 variety Yellow Creole. A portion of the upper slope of the station 

 at an elevation of about 750 feet was cleared and planted to Cara- 

 vonica cotton for comparing the growth of this variety at the higher 

 and lower altitudes. 



The investigations outlined in previous reports were continued 

 and a number of new ones begun. A number of plantings of cotton 

 were made from sea level to altitudes of 1,600 feet and the results ob- 

 tained indicated that altitude alone did not determine success. It 

 was also shown that the amount of rainfall necessary for good crop 

 production has not been definitely determined. Pruning back the 

 cotton plants at the close of each picking season and burning the 

 rubbish was determined to be an effective means of controlling the 

 Indian cotton bollworm. By this method the larvae and pupae of the 

 bollworm on the infested bolls were destroyed and the pruning in- 

 terrupted the crop of bolls as completely as a new planting where 

 cotton is treated as an annual. The station has developed a peculiar 

 type of Caravonica cotton in which the lint is unusually harsh and 

 strong and apparently Avell suited for mixing with woolen goods. 

 The quotation submitted by buyers and cotton graders on last year's 

 crop was 40 cents for Sea Island, 28 cents for Sunflower, and 25 cents 

 for Caravonica. 



The Japanese rices imported by the station were successfully grown 

 and satisfactory yields were obtained. The substitution of these rices 

 for the imported article has not been fully satisfactory, some con- 

 sumers claiming that they differ in certain undefinable qualities. 



56096°— 12 7 



