TRUE RELATION OF SCIENCE TO INDUSTRIES 301 

 ENTOMOLOGY. 



One of the numerous difficulties which adds to the 

 burdens of the agriculturist is the fight which he is con- 

 stantly carrying on against injurious insects. Almost 

 every year he is compelled to engage in an unequal 

 contest with the potato bug, the Hessian fly, the 

 weevil, the caterpillar, and the borers of his fruit trees, 

 while at intervals the locust, the army-worm, and the 

 grasshopper pour over his fields with resistless power. 

 It is the province of the entomologist to study the habits 

 and methods of reproduction of these injurious insects, 

 and to provide some way to arrest their almost marvel- 

 ous fertility. 



Much has already been accomplished in this direc- 

 tion, but much more remains to be done. It is evi- 

 dent that it is useless for a farmer to fight potato bugs 

 in his field, while they are left to increase unmolested 

 in the field of his neighbor. Action against insects must 

 be concerted and intelligent to be effective. Bush- 

 whacking and guerrilla warfare can never accomplish 

 anything more than a local result. The campaign, to 

 be effective, must be regular, with full equipments and 

 a perfect knowledge of the ground to be fought over 

 and the number and disposition of the forces of the 

 enemy. 



The farmer looks to the entomologist to direct him 

 in the campaign and furnish him all needful informa- 

 tion. 



With such scientific aid he should not despair of even- 

 tually freeing his fields of these insignificant but de- 

 structive pests which now cause him so much loss and 

 trouble. 



These are only a few instances of the true rela- 



