Author(s):

Punam Kashyap, SN Singh and M Surya Prakash Reddy and Jhumishree Meher

Abstract: Soybean [Glycine max (L.) Merr] is one of the most important legumes, rich in protein and oil, which can be used in agriculture and oil extraction industry. Rhizoctonia solani, where causing foot and root rots of young soybean plants which characterized by the browning of the vascular tissue of roots and stems.The present investigation were Rhizoctonia solani isolates collected from different Places viz Seoni, Katni, Balaghat, Bhopal, Mandala, Jabalpur, Sehora and Indore of Madhya Pradesh.These ten isolates were studied their Cultural and Pathogenic variability . The cultural variability were observed that different colony colour and average colony diameter were whitish grey, white, brown grey colour but most of isolates whitish grey-I₁, I₂, I₅, I₆, I₈ and maximum colony diameter is I₄, I₁, I₉ Followed By I₆, I₁₀.The Pathogenic Variability Observations were Maximum disease incidence recorded at pre- emergence stage was I₁₀ (20.00) and minimum disease incidence with I₁ (6.67) followed by I₃, I₇, I₉. Maximum disease incidence was recorded on post emergence stages with I₉ (69.55) and minimum disease incidence recorded with I₅ (6.67). However isolate I₉ was found more pathogenic as it exhibited highest (76.22) mortality as compared to other isolates.

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