Hawaii Agricultural Experiment Station, 



HOMOLULU. 



E. V. WILCOX, Special Agent in Charge. 

 PRESS BULLETIN PMO. 27. 



The Use of Insecticides in Hawaii 



BY 



DAVID T. FULL AW AY, 



ENTOMOLOGIST 



INTRODUCTION. 



The agriculturist has always to contend with insect pests, 

 which destroy or injure his crops. This is in the nature of 

 things, as insects are largely phytophagous. WeTe it not indeed 

 for the fact that parasitism is general within the class, a ruinous 

 condition would soon result. It is difficult to estimate the losses 

 occasioned by insects, but they must in the aggregate be enor- 

 mous. To prevent or mitigate them is largely a practical prob- 

 lem in which both entomologist and agriculturist are concerned. 

 The more practical aspects of the subject are already familiar 

 to the grower through experience, and the purpose of the present 

 paper, which deals principally with the insecticides which have 

 come into general use in Hawaii, is merely to bring together the 

 available information for the benefit of all. 



ARSENICAL INSECTICIDES. 



Arsenical insecticides kill by poisoning and are intended to 

 be ingested by the insect. They are the most widely applicable 

 of all the insecticides, but are only useful for insects with biting 

 mouthparts. The following are some of the leading arsenical 

 preparations : 



Revision of Bui. 3 — out of print. 



