Hawaii Agricultural Experiment Station, 



MOrNOLULU. 



E. V. WILCOX. Special Agent in Ctiarge. 



PRESS BUUUETIIS ISO. 33- 



CULTURAL METHODS FOR CONTROLLING 

 THE COTTON BOLL WORM. 



BY 



C. K. McClelland, Agronomist 



AND 



C. A. SAHR, Assistant in Agronomy. 



It is a matter of record that cotton culture has been attempted 

 in Hawaii upon several different occasions, but there can be no 

 doubt but what the attempt that has been made in the last few 

 years has been the largest and most systematic of any attempts 

 made. It seems to be that the profitableness of cotton culture is 

 going to depend largely upon the success that is obtained in con- 

 trolling insect pests. Cut worms, aphis, mealy bugs and others 

 at times cause considerable damage to the cotton plants, but the 

 one pest that does more' damage than all others combined is the 

 small boll worm {Gclcchia gossypicUa). In fields where the 

 worm has been undisturbed, as high as 60 to 75 per cent of the 

 bolls have been infested by this boll worm, in which case the cot- 

 ton that may be picked from the field will not be sufficient to 

 pay any profit on the labor involved in producing the crop. 



