Effectiveness of pre and postharvest chitosan treatments on storage decay of strawberries.
Romanazzi, G.; Nigro, F.; Ippolito, A.;
Rivista di Frutticoltura e di Ortofloricoltura Year: 2000 Vol: 62 Issue: 5 Pages: 71-75 Ref: 31 ref.
2000
บทคัดย่อ
Chitosan, a naturally derived polymer, was applied as preharvest and postharvest treatment for the control of the major fruit storage rots of strawberry (Botrytis cinerea and Rhizopus stolonifer). In field trials at Nova Siri, chitosan was sprayed at 0.10, 0.50 or 1.00% on strawberries at three growth stages (full bloom, green fruit and whitening fruit); untreated fruits or those treated with a fungicide (procymidone or pyrimethanil) were used as controls. In postharvest trials, strawberries were dipped for 3-4 seconds in chitosan solutions at 0.10, 0.25, 0.50 or 1.00%. Botrytis and rhizopus rots were evaluated after a 10-day storage period at 0 plus or minus 1 deg C followed by 4-6 days of shelf-life at 20 plus or minus 1 deg C. In preharvest treatments, chitosan reduced both rots, with the greatest reductions observed at 1.00% concentration. The best results were observed from treating fruits at the whitening stage. Similarly, chitosan, at the highest concentration, gave the greatest reduction
of grey mould in postharvest treatments, where the incidence of rhizopus rot was negligible.