Table 6 Plant growth, yield, and number of nodules of three cultivars of cowpea as affected by root-knot nematode, Meloidogyne incognita infection

Length (cm)

43.0 a

39.3 b

9.0

56.7 a

48.3 b

14.8

75.3 a

48.7 b

35.3

Fresh shoot weight (g)

82.9 a

65.2 b

21.4

111.9 a

80.7 b

27.9

104.1 a

85.6 b

17.8

Dry shoot weight (g)

31.6 a

19.9 b

37.0

26.9 a

22.5 b

16.4

25.6 a

21.2 b

17.2

Fresh root weight (g)

15.5 a

14.7 a

5.2

13.1 b

18.6 a

-

17.5 b

19.1 a

-

Dry root weight (g)

4.6 a

3.7 b

35.0

3.8 a

3.3 a

13.2

5.0 a

3.4 a

32.0

No. of pods

8.0 a

7.0 a

13.0

7.0 a

5.0 a

28.6

8.0 a

6.0 a

25.0

Weight of pods (g)

10.9 a

10.3 a

6.0

8.4 a

6.3 b

25.0

10.6 a

8.1 b

23.6

Weight of 100 seeds (g)

16.6 a

13.8 b

16.9

14.7 a

13.7 a

7.0

17.0 a

14.4 b

15.3

Average total percent Red. of plant growth and yield %

-

-

17.9

-

-

16.6

-

-

20.7

No. of nodules and %Red.

47.0 a

18.0 b

61.7

41.0 b

60.0 a

-

47.0 a

45.0a

4.3