EXERCISE 54 (Continued) 



makes the difference in the yield ? What insects are most injurious to cotton and what are the most 

 feasible ways of combating them ? State in writing how the injuries of the cotton boll weevil may 

 be prevented and indicate which of the ways suggested is more generally used in the neighborhood. 

 Has the presence of this insect changed to any degree the cropping systems of the south ? Have these 

 changes been advantageous and in what way and why? State in detail how the yield of cotton in the 

 neighborhood may be increased. 



References. Waters, H. J. Essentials of Agriculture, pp. 177-185. Ginn and Company. Bergen and 

 Caldwell. Introduction to Botany, p. 313. Ginn and Company. Duggar, J. F. Southern Field Crops. The 

 Macmillan Company. 





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