Pathogenic Potential of Meloidogyne incognita and Rhizoctonia solani Alone and in Combination on Hyoscyamus niger

Effect of root-knot nematode, Meloidogyne incognita and root-rot fungus, Rhizoctonia alone and in combinations on the growth of black henbane, Hyoscyamus niger were studied. Results indicated an inverse relationship between initial inoculum densities of M. incognita/R. solani and plant length, fresh and dry weights. Significant reduction in plant dry weight was observed at initial inoculum of 50 J₂ of M. incognita and 1.0 g culture of R. solani/pot. The initial inoculum densities and final nematode population/root-knot index showed a direct relationship. Simultaneous or sequential inoculation of both the pathogens reduced plant growth more than when inoculated separately.