Application of Pseudomonas sp. and Bio-Resources in Controlling Alternaria Leaf Spot Disease of Brinjal (Solanum melongena L.)

Abstract

This study was conducted during the Kharif season 2022-2023 at the Central Research farm,  Department of Plant Pathology, SHUATS, Allahabad, U.P to conclude the Application of Pseudomonas sp. and Bio-Resources in Controlling  Alternaria leaf spot disease of brinjal (Solanum melongena L.). Seedling treatment with bioagent viz., Pseudomonas sp. at 0.25% and bio-resources applied as a foliar spray viz., Neem extract + Clove extract (5 + 5%), Neem oil + Clove oil(5+5%), Neem extract (10%), Clove extract(10%), Neem oil(0.2%), Clove oil(0.2%) and Bavistin(0.1%, treated check) for their effectiveness to manage Alternaria leaf spot of brinjal caused by Alternaria alternata. All the treatments were significantly reduced the severity of the disease and increased growth parameters. Among all the treatments Pseudomonas sp. + Neem extract + Clove extract (32.37%) was most effective followed by Pseudomonas sp. + Neem oil + Clove oil (34.39%) were significantly superior over other treatments in reducing the leaf spot infection of brinjal. The highest cost benefit ratio was obtained in the treatment Pseudomonas sp. + Neem extract + Clove extract (1:6.72). While other treatments also showed significant eff/efficacy to check the disease intensity (PDI) and yield over control in the field condition.