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University of Nebraska–Lincoln

Common Stalk Borer Economic Injury Levels

Common Stalk Borer Economic Injury Levels (%Injured Plants)
(Assumes 80% Insecticide Efficacy)

Corn leaf stage
125 bu/acre potential
 
$2/bu crop value
$3/bu crop value
 
Control costs/acre
Control costs/acre
  $7 $10 $13 $7 $10 $13
1 7 9 12 4 6 8
2 8 11 15 5 8 10
3 10 14 18 6 9 12
4 11 16 20 7 10 13
5 11 16 21 7 11 14
6 22 32 41 15 21 27
7 100 100 100 100 100 100
Corn leaf stage
150 bu/acre yield potential
 
$2/bu crop value
$3/bu crop value
 
Control costs/acre
Control costs/acre
  $7 $10 $13 $7 $10 $13
1 5 8 10 4 5 7
2 7 9 12 4 6 8
3 8 12 15 5 8 10
4 9 12 16 6 8 11
5 9 13 17 6 9 11
6 18 26 33 12 17 22
7 100 100 100 100 100 100