The Bulletin 
115 
ing, (2) rotation of crops, (3) fertilization, (4) drainage, (5) ridging, 
(6) fall and winter plowing, (7) thorough cultivation, (8) destruction 
of native food plants. It will be noted at once that all of these factors 
are what might be called indirect methods of control. From the very 
nature of the case it would be impossible to apply any direct methods, 
for all such methods are expensive and the returns from corn are never 
great enough to justify the expense involved in their application. 
Figure 65. Diagram showing the percentage of corn injured 
when planted at different dates, in Pender County. 1. uorn 
planted late in March. 2. Corn planted mid April. 3. Corn 
planted early May. 4. Corn planted early June. 5. Corn 
planted early July. 
