Vol. 4, Issue 3 (2017)
Post-harvest application of botanical extracts from the sunderbans for controlling disease and extending shelf life of mango (Mangifera indica L.)
Author(s): Joydeb Gomasta, Md. Resaul Islam, Sabiha Sultana, Ashraful Alam
Abstract: An experiment was conducted with aqueous extracts of leaves of three plants of Sunderbans i.e. Sundari (Heritiera fomes), Keora (Sonneratia apetala) and Kankra (Bruguiera gymnorrhiza) to find out the efficacy of controlling post-harvest disease and extending shelf life of mango. In this study, the efficacy of the three plant extracts at four different concentrations viz., 20%, 30%, 40% and 50% along with control were used. The experiment was laid out in CRD with four replications. Infection percentage as well as percent disease index (PDI) was observed up to 20 days after treatment. The highest disease index (100%) was observed at control (0% concentration) within 12 days after treatment while at 50% concentration disease index reached to 100% after 18 days of treatment in case of Sundari and Kankra extract and after 20 days of treatment for Keora extract. An increasing trend in post-harvest disease control was noticed with the increase in concentration of leaf extracts. Thus, maximum shelf life was observed at 50% concentration of all the three botanicals. In comparison to other leaf extracts, Keora at 50% level also found more effective in extending shelf life of mango up to 18 days having statistical similarity with that of Kankra extract (17.25 days). Now, it is obvious that botanical extracts efficiently control post-harvest disease and extend shelf life of mango up to certain degree of concentration.