CULTURAL AND MORPHOLOGICAL CHARACTERS OF S. ROLFSII CAUSING STEM ROT OF GROUNDNUT AND ITS MANAGEMENT USING BIOPESTICIDE
A. S. Narhe and N. S. Suryawanshi*
ABSTRACT
Ten isolates of Sclerotium rolfsii Sacc. were isolated from stem rot of groundnut. It was collected from different parts of Maharashtra. Cultural and Morphological characters of S. rolfsii was studied using PDA medium. There were 10 isolates studied based on mycelial characters, colony colour, colony growth rate, appearance and also studied sclerotial formation and sclerotial arrangement viz. central, peripheral as well as scattered throughout colony, number of sclerotia per plate etc. Significant variations in mycelial and sclerotial characters of isolates were observed. All ten isolates were tested their sensitivity against Demold. It was observed that in all isolates Sr1 was sensitive (MIC 20300 ppm) while Sr 9 was tolerant (MIC 10300 ppm) to Demold.
Keywords: Groundnut, stem rot, Sclerotium rolfsii and Demold.
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