7u 

 The Roots — 



(a) Young plants are killed or withered; roots eaten — White Grubs or 

 Wireworms. 



(b) Young plants unequal in growth; roots dwarfed without external injury; 

 presence of ants — Corn-Root Louse (Aphis maidiradicis). 



The Stalk— 



(a) Plants cut ofT near surface of ground — Cutworms. 



(b) Plant unthrifty and covered with greenish plant Uce — Corn-Plant Louse 



(Aphis maidis). 



The Leaves — 



(a) Leaves thickly covered with green plant Uce — Corn-Plant Louse (Aphis 

 maidis) . 



(b) Leaves eaten — Army Worm (Leucania unipuncta) or Grasshopper. 

 The Ear — 



(a) Developing kernels eaten, with much excrement — Corn-Ear Worm 



(Heliothis armiger). 



(b) Stalks of ears covered with plant lice — Corn-Plant Louse (Aphis maidis). 



INSECTS INJURING PEAS AND BEANS. 



The Planted Seeds — 



(a) Plant fails to come up, may be caused by white grubs or wireworms^ 

 or Bean or Seed Corn Maggot. 



The Stalk and Leaves — 



(a) Plants cut off at night — Cutworms. 



(b) Plants unhealthy often killed due to sucking lice — Pea Louse (Macrosi- 

 phum pisi). 



