Abstract
Results of three successive years' studies under experimental plot condition showed a significant correlation between VAM infection in roots of six wheat varieties viz., Blue silver, Maxi-Pak, Pak-70, Pavon, Sindh-83, and ZA-77 and density of VAM spores in their rhizospheric regions. VAM infections in roots of all the six varieties initially established then progressed in sigmoid fashion till harvesting stage. While the density of VAM spores reduced significantly (P<0.Ol) in rhizospheric regions on sowing seeds of wheat varieties then increased exponentially and reached the highest at harvesting stage. The regression line showed the dependency of Y-variable On X-variable with 38 to 68 % variation.
