INJURIOUS INSECTS AND THEIR CONTROL 



BY 



WARREN T. CLARKE. 



The agriculturist, no matter what crop he may be interest- 

 ed in, usually finds that he has to take into account and 

 overcome, if may be, the ravages of insect pests. Sooner 

 or later the question of means of control is sure to present 

 itself to him, and on the solving of this question will de- 

 pend the possible profit or loss in his farm operations. An 

 intelligent knowledge of the fundamental principles govern- 

 ing the study of insect pests and an acquaintance with the 

 best and most economical ways of applying these principles 

 Incomes therefore each day more necessary. The orchard- 

 ist, the grower of field crops, the truck gardener, each of 

 these must, to a certain extent, work out the problem in 

 liis own environment. The fact recognized that some insect 

 is destroying entirely, or greatly reducing, the value of his 

 crop is not sufficient knowledge upon which to base reme- 

 dial measures. An acquaintance with the way in which 

 the insect makes the damaging attack is necessary, and 

 then the general character of the remedy to be used under 

 these observed conditions must be known for effective work 

 to be done. 



It is not in the intention nor scope of the present Bulle- 

 tin to give a complete treatise on the injurious insects of 

 this state nor to lay down rules of procedure that will be en- 

 tirely applicable in every case of damage that may arise. 

 Indeed, there are questions in the control of certain insect 

 pests that are today not solved, so we can only at present 

 call , +tention to well known principles of procedure in 

 uch cases. On the other hand, there are many such ques- 

 tions that have received, either here or elsewhere, an ad- 



