Management of bacterial blight and leaf spot diseases of upland cotton using Pseudomonas Jluorescens

摘要

Pseudomonas Jluorescens ( Pf_1) was tested against foliar diseases of upland cotton. Namely the tested Pf_1. strain showed lowest per cent disease index as compared to the untreated control. Pooled data of three years revealed that the per cent disease control (PDC) due to the use of P. Jluorescens ranged for bacterial blight (40.3 to 56.5%), Myrothecium (33.3 to 56.4%), Alternaria (41.9 to 60.2 %) and Cercospora leaf spots (34.7 to 47.7 %). Efficacy of biocontrol agent was comparable to that of chemical fungicides like copper oxychloride, 50 WP. The seed cotton yield was significantly higher (2290kg/ha) in seed treatment with P. jluorescens (Pf_1 strain) @ 10 g/kg seed+ foliar spray @ 0.2 per cent at 30, 40, 50, 60,70, 80 and 90 DAS) than the untreated control (1890kg/ha).