ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Influence of orchard management and postharvest treatments on fruit decay caused by Penicillium expansum and "core browning" in postharvest of pear.

Frances, J.; Bonaterra, A.; Juan, J. L.; Vilardell, P.; Montesinos, E.;

Acta Horticulturae Year: 1997 Issue: No. 448 Pages: 203-209 Ref: 12 ref.

1997

บทคัดย่อ

The effects of orchard management and postharvest treatment on pear (cultivars Passe Crassane and Conference) fruit decay caused by P. expansum, and core browning during storage, were investigated in 3 trials conducted in Spain in 1995-96. In the first experiment, fruit was collected from 4 orchards managed using different cultural practices, and analysed for preharvest fungicide residue, mineral content and fruit quality. Three postharvest treatments were applied: control, fungicide (imazalil and folpet) treatment and biological control (treatment with Pseudomonas fluorescens). In the second experiment, fruits received 5 different preharvest fungicide treatments (involving captan, tebuconazole or thiram) and the bacterial antagonist. Core browning was investigated using Passe Crassane fruits harvested from 3 orchards on different dates (1, 13 or 20 October) and cold stored for different periods (until 6 February, 3 April or 15 May). After storage, fruits were preripened at 8 deg C for 26 days,

or held at 10 deg and 8% RH for 10 days. Results showed that fruit sugar content was an important factor in the decay caused by P. expansum. Biological control by P. fluorescens was less effective than control by the fungicide treatments. Fruit mineral content was not significantly different between orchards and could not explain differences in susceptibility to P. expansum. Preliminary data indicated that core browning was related to late harvest, lower fruit Ca content and preripening of fruits after cold-storage.