Vol. 10, Special Issue 9 (2021)

Author(s):
Lalita Lakhran, RR Ahir, Naresh Kumar, Deepika Nehra and Satyadev Prajapati

Abstract:
Sesame (Sesamum indicum L.) is oldest oil seed crop and affected by many diseases, in which Macrophomina phaseolina pathogen causes heavy yield losses during cropping season. It caused stem and root rot and prevalent on all plant parts and pathogen is saprophytic and soil borne, so management is difficult in nature, therefore is a major problem of sesame due to its wider host range and survive in soil in the form of sclerotia. The disease incidence was (23.84 - 53.72%) recorded during survey in major sesame growing areas of Rajasthan. Disease incidence was found maximum in Jodhpur district (41.14%) followed by Pali (38.71%), Jaipur (35.90%), Nagaur (28.58%) and lowest incidence was observed in Tonk district (24.41%). Mean disease incidence was 33.74%. Pathogen was isolated from infected stem and root parts and purified by using hyphal tip cut method. Pathogenicity was proved through Koch’s postulates by using seed cum soil inoculation techniques and 53.84% disease incidence.