Vol. 11, Issue 3 (2022)

Author(s):
Karan Singh, Dr. CB Meena, Dr. Chirag Gautam and Balram Jewaliya

Abstract:
The present study was undertaken in order to find out the prevalence and incidence of the Collar rot in Chickpea in Kota district of Hadoti region of Rajasthan caused by Sclerotium rolfsii, a roving survey done nearby places of Agriculture Research Station (ARS) Ummedganj, Kota district during Rabi season of 2018-19 in different places viz., ARS-Ummedganj, Sangod, Sultanpur, Itawa, Galana, Dhakarkhedi and Char-chouma. Collar rot is often seen in the seedling stage, particularly under high moist condition. Maximum incidence was recorded in the field of Agriculture Research Station, Ummedganj & Mechanized Agriculture Farm, Ummedganj (19.82%), followed in decreasing order in the field of Galana (14.38%) Sultanpur (12.05%), Sangod (11.20%), Itawa (10.40%), Dhakerkhedi (9.32%) and Char-Chouma (6.69%). Thus, the incidence of collar rot in chickpea was in the range of 6.69% - 19.82%, which was quite high to causing seedling mortality and cause considerable losses to the crop. For the laboratory experimental studies, standard potato dextrose agar (PDA) medium was used for isolation and culturing S. rolfsii. Standard tissue isolation technique was followed for the isolation of the fungus. Later, the bit of hyphal tip of fungal growth was transferred to PDA slants for obtained pure culture. The pathogen was inoculated through Soil inoculation, Seed inoculation and Seedling inoculation for testing pathogenicity.