Search Results

You are looking at 1 - 2 of 2 items for

  • Author or Editor: P.J. Vergano x
Clear All Modify Search

Cut carnation (Dianthus caryophyllus) `White Sim' flowers from Columbia (South America), nontreated or dipped for three seconds in water or 9.5 g/1 benlate (DuPont) or 3336 (Cleary), were placed in “orchid tubes” and remained in air or were packaged in barrier bags of air or 10% CO2/10%O2 (80%N2). Postharvest life (days) was recorded, and the CO2, O2, and CH2=CH2 concentrations within the bags were monitored with gas chromatographs. Controls, nonsealed and in air, did not differ in postharvest life, indicating no benefit from a fungicide dip (P= 0.05). Botrytis was not observed in this test. Flowers sealed in bags did not differ in postharvest life (P= 0.05); however, when a single degree of freedom comparison was made (PR>F: 0.0001), their postharvest life was longer than controls (5.8 vs. 3.1 days). In bags, CO2 increased and O2 decreased over time, CO2 remaining higher and O2 lower with the 10%CO2/10% O2 treatment. CH2=CH2 increased to 4 ppm over 10 days, but ppm within bag treatments did not vary on any day (P= 0.05).

Free access

The packaging of flowering Phalaenopsis sp. orchids in sealed plastic film offers potential advantages of extending shelflife and maintaining quality by slowing respiration and protection from the hazards of retail distribution. Following treatments, 2-year-old plants, each with three to nine open florets, were stored at 21 to 27C for 76 days under natural light and natural daylengths. Plants were sealed individually in bags of air, or in bags of initially 15% O2, 23% CO2, balance N,, or 20% O2 and 30% CO2. Control plants were left in open air and were watered twice weekly; plants in sealed bags were not watered. Gas concentrations in the sealed bags were monitored twice weekly. The various atmospheres had no effect on floret life. Two distinct patterns of O2 and CO2 variation with time were observed, but inflorescence half-life values were not related to these patterns. Florets on plants in bags had a greater incidence of discoloration.

Full access