INSECTS INJURIOUS TO CORN. 



145 



Means of Control. — The control of these pests is rather 

 a difficult task. S. rohustiis, which breeds in corn and 

 winters in a pnpal cell in the roots and stalk as an adult 







Fig. 80. — Sections of Sugar cane showing- work of Sphenojilwrvs 

 ohacnrus. a, larva; b, papa; c, probable points of ovipo!;ition. 

 (After Riley and Howard, "Insect Life.") 



beetle, might be destroyed by plowing np and burning the 



stubble. '8. oclireus, as are in fact all of the species, is 



most injurious on recently cleared swamp-land, and usually 



disappears as fast as these lands are drained and cultivated. 



Planting llax, potatoes, or some crop not attacked by these 



