Bio-efficacy and management of stem rot (Sclerotium rolfsii) of groundnut with different fungicides and bioagents

Abstract

Groundnut (Arachis hypogaea L.) is an important oilseed crop throughout the world. Groundnut is infected by several fungal, bacterial and viral diseases but Stem rot caused by Sclerotium rolfsii is considered as one of the most devastating diseases in the groundnut growing areas of Southern Rajasthan. In In vitro conditions Trichoderma harzianum showed highest mycelial inhibition zone of the pathogen in comparison to T. viride and T. viride (Resident isolate). Among the fungicides Tebuconazole and Hexaconazole inhibited mycelial growth maximum at both 500 and 750 ppm concentrations. In field condition the minimum per-cent incidence was found in Tebuconazole (250, 500 and 750 ppm) which is most effective treatment among all the treatments respectively.