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Corn Pest Diagnostic Key

stage II corn

Stage II. Emergence to Knee-High Corn (VE to V8)

 

Stunting or Wilting
wireworms
Wireworm
white grub
White Grub
chinch bug
Chinch Bug
corn root aphid
Corn Root Aphid

 

Center Leaves Dying or Dead
wireworms
Wireworm
black cutworm
Black Cutworm
stalk borer
Stalk Borer

 

Unnatural Growth (Stem Twisting or Excessive Tillering)
stalk borer
Stalk Borer
billbug
Billbug

 

Removal of Plant Tissue - Irregular Narrow Lines Scratched From the Top of the Tissue
flea beetle
Flea Beetle

 

Removal of Plant Tissue - Whole Plants Cut Off Near Base
black cutworm
Black Cutworm
sod webworm
Sod Webworm

 

Removal of Plant Tissue - Chunks of Leaf Tissue or Entire Leaves Eaten
stalk borer
Stalk Borer
armyworm
Armyworm
dingy cutworm
Dingy Cutworm
southern corn leaf beetle
Southern Corn
Leaf Beetle

 

Removal of Plant Tissue - Green Tissue Between Upper and Lower Leaf Surfaces Removed
corn blotch leafminer
Corn Blotch
Leafminer


Planting to Emergence Emergence to Knee-High
Knee-High to Tasseling Tasseling to Full Maturity
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