Root-knot nematode infestation and nodulation as influenced by va Mycorrhizal association in cowpea

Influence of VA mycorrhizal association on nodulation and Meloidogyne incognita infestation in cowpea was studied. Dual inoculation with Rhizobium and VA mycorrhiza significantly improved the plant growth and noddation. M. incognita drastically reduced the plant growth. The galling, root-knot index and nematode population were very high. Wherever mycorrhiza and M. incognita occurred together, the deleterious effect of M. incognita was insignificant. Further, the galling, root-knol index and nematode population were reduced to a great extent by VAM association.