PRODUCTION OF CORN 



vention of weeds may become the chief object of cultivation. 



Insect injuries. At various times during the growing 

 season corn may be injured by a number of different insects. 

 Cut worms, white grubs, corn-root lice, and chinch bugs are 

 usually the most destructive. 



Cut worms are most dangerous to the very young plants. 

 It has been found that fall plowing and late spring planting 

 reduce the injuries caused by these insects. They are likely 

 to be more numerous in 

 land prepared from old 

 grass sod. If such land is 

 used for corn, extra pre- 

 cautions must be taken 

 against cut worms. To a 

 certain extent, these insects 

 may be controlled by allow- 

 ing corn to follow a legume, 

 such as clover, in a rotation. 



White grubs, the larvae 

 of May beetles, are trouble- bodies act as spores which may infect a 



Some at times. The same corn plant producing what is commonly 



methods of control may called corn smut 



be used as those applied to the control of cut worms. 



In some sections the corn-root lice are very destructive. 

 It has been found that fall plowing is the best means of 

 control. 



Chinch bugs are not very injurious except in seasons 

 when there is little rain. It is the habit of these insects to 

 seek grass or other vegetation in which to spend the winter. 

 By burning such material in the fall the danger of injury 

 from chinch bugs may be much reduced. 



Other insects, such as wire worms, corn-stalk borers, 



Development of a spore 01 corn smut. 



A. Smut spore germinating. 



B. After germinating, numerous bod- 

 ies known as conidia appear. These 



