166 



Elementary Principles of Agriculture 



tecting tomatoes from this insect. Much better results 

 will be secured if the corn is planted late. (Fig. 103). 



235. The Mexican Boll-Weevil is a true weevil, 

 resembling very closely the plum curculio. It has been 



m 



Fig. 105. Mexican boll-weevil. A, ap- 

 pearance of normal " square ; B, 

 "flaring" following the deposit of 

 eggs in the unopened bud; C, part 

 of flower bud removed to show 

 larva. 



known in Mexico for years, 

 though it was not found 

 in this country until in the 

 early nineties. The mature 

 stage in the life history of 

 the Mexican boll-weevil is 

 shown in Fig. 104. These in- 

 sects leave their winter shelter early in the spring and 

 deposit the eggs in the flower-buds or squares. The 

 weevil does not deposit eggs in the young bolls when 

 the flower-buds are to be found. When the egg is thrust 



