10 



SUMMARY. 



The general acccount which hars been given of this insect in preced- 

 ing pages has been brought together at this time because of the practi- 

 cal certainty that in the natural course of events this bug will before 

 long endeavor to reinvade territory north of its present range (in 

 1908), and may again become a pest for a nmnber of years, until 

 climatic conditions adverse to its development or increase check its 

 northward spread. 



In conclusion^ it should be repeated that the systematic destruction 

 of the insects by means of the trap-crop method described, together 

 with a system of clean cultural practice throughout the entire season 

 and especially in the late fall, will leave little else to be done save the 

 gathering by hand of such insects as escape these measures or which 

 may fly from infested to uninfested fields. 



To prevent the pest from advancing farther northward than its 

 jyresent limits, careful watch should he kept for the first appearance 

 of the insect, and remedies should he prompt and thorough. The im- 

 portance of killing off the first or hibernated brood of bugs and their 

 progeny can not be too strongly emphasized. 



Approved : 



James Wilson, 



Secretary of Agriculture. 



Washington, D. C, May 4, 1908. 



[Cir. 103] 



o 



