Circular No. 123. 



Issued J uiii' 10, 1910. 



United States Department of Agriculture, 



BUREAU OF ENTOMOLOGY. 



L. O. HOWARD, Entomologist and Chief of Bureau. 



METHODS OF CONTROLLING TOBACCO INSECTS. 



By A. ('. Morgan, 

 Agent and Expert. 



INTRODUCTION. 



Investigation by the Bureau of Entomology of the United States 

 Department of Agriculture of insects affecting tobacco has been in 

 progress in the "dark tobacco" districts of Kentucky and Tennessee 

 since July, 1907. 



In the work in Tennessee the Bureau of Entomology has had the 

 hearty cooperation of the Ten- 

 nessee agricultural experiment 

 station and of its director, Prof. 

 II. A. Morgan. During the sum- 

 mers of 1908 and 1909 Professor 

 Morgan assigned a student, Mr. 

 D. 0. Parman, of the University 

 of Tennessee, as an assistant to 

 the Federal agent in charge of 

 the tobacco-insect investigations. 

 The writer wishes to express his 

 thanks to Professor Morgan for 

 the personal advice received from 

 him and for this valuable coopera- 

 tion. 



In this investigation all in- 

 sects found affecting tobacco have been studied, but particular 

 attention has been given to the different species of cutworms, to 

 the tobacco flea-beetle (Kpitrix jmrvula Fab.), and to the tobacco 

 horn worms (Phlegetliontius sexta Job. and P. quinquemaculataHaw . V 

 In this particular circular only the insects mentioned above are 

 considered. Although the investigation has not been completed. 



1 



Fig. 1. — Agrotis ypsilon, one of the tobacco cut- 

 worms: a. Larva; h, head of same; c, adult. 

 Natural size. (From Howard.) 



