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