Vol. 11, Issue 5 (2022)

Author(s):
V Premalakshmi, J Rajangam, J Prem Joshua, T Arumugam and C Sankar

Abstract:
An experiment was conducted to study the effect of chitosan coating on the physical-chemical characteristics of guava cv. Lucknow 49 fruits stored at room temperature (28± 2 °c & 60 ± 10% RH) cumulative physiological loss in weight (CPLW) increased gradually in all the treatments with advancement of storage period.per cent increase in weight loss was recorded significantly low in 1.0% and 1.5% chitosan chitosan treated fruits were pre harvest spray with 2 per cent at MG stage. Postharvest treatment of chitosan at 1.5 per cent on fruits at colour turning stage recorded minimum PLW (%) than 1.0 per cent chitosan coating. The highest fruit weight loss was recorded in fruits which were not coated with chitosan irrespective of fruits being pre harvest sprayed with Ca(NO3)₂ at 1.0 and 2.0 per cent. Pre harvest spray with calcium nitrate (1 & 2%) and postharvest treatment of chitosan (1 & 1.5%) at mature green stage recorded maximum fruit firmness than at color turning stage. Significant differences were observed for the total sugar (%) and Total soluble solids (° Brix) in chitosan coating of fruits at MG and CT stage fruits from pre harvest spray at 1.0 and 2.0 per cent.