Volume : IV, Issue : VI, June - 2014

Biopreservation of Onions Using Plant Extracts and Antagonistic Organisms.

Roopa, V. M, V. C Suvarna

Abstract :

Maximum post harvest loss in onions is attributed to microbial spoilage. So, a few medicinal plant extracts and antagonistic organisms were screened for their antimicrobial activities against isolated spoilage organisms. It also included the study of various post harvest treatments to increase the shelf life of onions of Bellary red variety by preventing post harvest diseases by employing effective combinations of plant extracts and antagonistic organisms. Aspergillus sp. Penicillium sp. Botrytis sp. Erwinia sp. Bacillus and Staphylococcus sp.were isolated from Bangalore rose and Bellary red onion varieties. Leaf extracts like onion and turmeric leaf extract at 50 % concentration, Pseudomonas putida and Saccharomyces cerevisiae, were selected after screening based on there antimicrobial activity under in vitro conditions. Post harvest treatments to extend the shelf life of onions, turmeric leaf extract at 50 % concentration, Pseudomonas putida and onion leaf at 50 % + turmeric leaf extract at 50 % concentration were found to be more effective compared to the other treatments. There was increase in shelf life of onions by two to three weeks compared to the other treatments.

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Article: Download PDF   DOI : 10.36106/ijar  

Cite This Article:

Roopa, V.M, V.C Suvarna Biopreservation of Onions Using Plant Extracts and Antagonistic Organisms. Indian Journal of Applied Research, Vol.IV, Issue.VI June 2014


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