WORMS BORING IN MAIN STALK 



125 



less than a half inch long, dark red, somewhat flattened, and has a 

 large thorax and a fairly narrow " waist." 



The pest passes the winter as an adult beetle in the ground. The 

 larva) are found throughout summer in the ground, and are very 

 active, attacking other insects. 



Since only wet ground is chosen by this insect, corn should be omitted 

 from such fields if possible. Late planting apparently serves to dis- 

 courage the beetles, and to ward off most of the injury. 



Occasionally similar damage is done by another ground beetle, 

 Agonoderus pallipes Fab. It is a black, oblong beetle, one fourth of an 

 inch long, and destroys corn by eating out the germ end. No direct 

 remedial measures have been devised. 



The Corn-stalk Borer (Diatrcea zeacolella Dyar) 



In both Northern and Southern states field corn is subject to serious 

 injury by a borer, the immature stage of a moth, closely related to 



Fig. 100. — Work of the Sugar-cane Borer. Original. 



