RESUMEN
Carrot is an important root vegetable which plays an important role in human health. Globally, Post harvest diseases are the major constraint in carrot production, especially soft rot which resulting in severe yield loss. Early diagnosis of these post-harvest diseases paves a way for reducing the economic losses. Carrot samples showing typical rotting symptoms were collected from markets of four different districts of Tamil Nadu and the pathogen involved were isolated. Severe carrot soft rot incidence (66.74%) was observed in samples collected from Ooty area of The Nilgiris district and the least disease incidence of (16.21%) was recorded in Perundurai of Erode district. Pathogenicity of soft rot pathogen were conducted and the virulent isolates were identified based on Percent Disease Index (PDI) showing >50% rotting falls under disease grade 9 using disease grade scale (0 to 9). The bacterial isolates (KPB-7 and OCB-5) causing soft rot were characterized using various biochemical assays where in they showed positive response for methyl red, H2S gas production, KOH and catalase tests besides showing negative response for gram’s reaction. Furthermore, molecular characterization of 16s rRNA region revealed the soft rot isolate (KPB-7) as Pectobacterium carotovorum subsp carotovorum (with an accession number OR251119).
RESUMEN
Aim: Okra is a vegetable that holds a significant share in both domestic and export markets, but it is prone to desiccation and fungal spoilage, leading to a short shelf life. A laboratory study was undertaken to determine the effects of hexanal containing aqueous formulation to improve the shelf life of okra with the objective to maintain the best quality of pods for end consumer acceptance.Study Design: Factorial Completely Randomized Design was followed with three replications.Place and Duration of Study: The study was conducted in laboratory conditions, Department of Vegetable Science, Horticultural College and Research Institute, Coimbatore during 2021-2022Methodology: In this study, TNAU released nanoformulation– TNAU FRUITY FRESH – ENHANCED FRESHNESS FORMULATION consisting of 2% Hexanal, 10% Formulation ingredients, 88% Deionized filler. and hexanal was used at varying concentrations for imposing treatments on freshly harvested, uniform sized undamaged tender pods of bhendi hybrid COBh H4 (TNAU released hybrid) using spray and dip methods under ambient and cold storage conditions and physiological parameters were assessed.Results: As per the investigation, 2% Enhanced Freshness Formulation using dip method in cold storage conditions slower the physiological loss in weight, preserves the L*, a*, b* value, extend the shelf life and preserved the quality for consumer acceptance during storage 9 days as compared to control.Conclusion: The study gave the knowledge of hexanal containing aqueous formulation and their effectiveness to use as post-harvest technology tool for okra.