Table 6-3. Estimated corn yield loss (bu/A) due to defoliation by cereal leaf beetle, grasshoppers, or other leaf feeding insects.

Leaf

Stage

PERCENT LEAF AREA DESTROYED

10

20

30

40

50

60

70

80

90

100

7

0

0

0

1

2

4

5

6

8

9

 

8

 

0

 

0

 

0

 

1

 

3

 

5

 

6

 

7

 

9

 

11

 

9

 

0

 

0

 

1

 

2

 

4

 

6

 

7

 

9

 

11

 

13

 

10

 

0

 

0

 

2

 

4

 

6

 

8

 

9

 

11

 

14

 

16

 

11

 

0

 

1

 

2

 

5

 

7

 

9

 

11

 

14

 

18

 

22

 

12

 

0

 

1

 

3

 

5

 

9

 

11

 

15

 

18

 

23

 

28

 

13

 

0

 

1

 

3

 

6

 

10

 

13

 

17

 

22

 

28

 

34

 

14

 

0

 

2

 

4

 

8

 

13

 

17

 

22

 

28

 

36

 

44

 

15

 

1

 

2

 

5

 

9

 

15

 

20

 

26

 

34

 

42

 

51

 

16

 

1

 

3

 

6

 

11

 

18

 

23

 

31

 

40

 

49

 

61

 

17

 

2

 

4

 

7

 

12

 

20

 

27

 

35

 

45

 

56

 

69





Corn Page




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Return to Vernon James Center Publications Page

This page (http://www.ces.ncsu.edu/plymouth/pubs/ent/crsoil.html) was created by John W. Van Duyn Ph D. Extension Entomologist, Wayne Modlin, Res. Tech. III and Andy Summerlin.

Date Created 1/30/01.
Last revised on 1/30/01.

Published by North Carolina Cooperative Extension Service

Distributed in furtherance of the Acts of Congress of May 8 and June 30, 1914. Employment and program opportunities are offered to all people regardless of race, color, national origin, sex, age, or disability. North Carolina State University at Raleigh, North Carolina A&T State University, U.S. Department of Agriculture, and local governments cooperating.