15 



and impractical system of cotton growing. This erroneous idea has 

 been largely dispelled by the distribution of publications upon this 

 subject and by the demonstration work conducted by the Bureau of 

 Entomology during the boll weevil and bollworm investigations. 



The influence of unscientific methods of farming upon insect depre- 

 dations has been repeatedly shown. In the case of the bollworm, 

 as with many other insects, it has been found from experiments con- 



^^__^ l£6£NO : 



/tpen or Mate o/russ seifsite /tuumr. 

 M£/t OF HOi^r loss. 



Fig. 4. — Area of bollworm injury la Texaa, Indian Territory, and Oklahoma iu 1906. 



ducted during the past few years that much success attends the adop- 

 tion of improved farm methods, such as : 



(1) The planting of early maturing varieties. 



(2) 

 (3) 



(4) 



(5) 



290 



Early planting in the spring. 

 The use of fertilizers. 

 Early and thorough cultivation. 



The plowing in the fall or winter of all land likely to con- 

 tain hibernating pupae. 



