Broad bean seeds were treated by Ridomil combined with seeds inoculation with specific strain of Rhizobium leguminosarum biovar viceae to study the effect of fungicide application and rhizobial inoculation on Rhizoctonia solani causing damping~off and root-rot diseases.
Data show that soil infested with R solani alone caused the highest percentage of damping-off and root-rot diseases. Above mentioned diseases significantly decreased by using either Rh. leguminosarum biovar viceae or Ridomil in combination with R. solani and the lowest percentage of disease severity was obtained in the treatment included R. solani + Rh. leguminosarum + Ridomil Nitrogenase activity and root nodulation reached their highest values with rhizobial inoculation alone Soil infestation with R. solani combined with rhizobial inoculation significantly reduced N2-ase activity and root nodulation, while above mentioned parameters were non-significantly decreased with the application of fungicide in combination with R. solani + Rh. Leguminosarum.
1 here was a significanl decrease in studied growth characters due to soil infestation with R. solani, alone On the contrary , studied growth characters were significantly increased with rhizobial inoculation alone as well as when Rh leguminosarum combined with either R. solani or Ridomil and all of them Soil infestation with R. solan, alone gave the lowest values of chemical constituents of laba bean plants In contrast, N, P. K, chlorophyll and total carbohydrates were increased with either rhizobial inoculation or fungicide application when used alone or in combination with R. Solani.