Week: 13 Effect of Controlled Atmosphere Storage on the Quality of Three Fresh Fig Cultivars Adopted...
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Week: 13 Effect of Controlled Atmosphere Storage on the Quality of Three Fresh Fig Cultivars Adopted from: Adopted from: Carlos H. Crisosto Carlos H. Crisosto http://groups.ucanr.org/fresh fig
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Transcript of Week: 13 Effect of Controlled Atmosphere Storage on the Quality of Three Fresh Fig Cultivars Adopted...
Week: 13
Effect of Controlled Atmosphere Storage on the Quality of Three
Fresh Fig Cultivars
Adopted from:Adopted from:
Carlos H. CrisostoCarlos H. Crisosto
http://groups.ucanr.org/freshfig
Controlled Atmospheres (CA) involves:
•Reduced oxygenReduced oxygen
• Increasing carbon dioxideIncreasing carbon dioxide
•Adding carbon monoxideAdding carbon monoxide
•Removing carbon dioxide, Removing carbon dioxide, ethylene and other volatilesethylene and other volatiles
The Commodity of Its Environment
• B1 (commodity depends on:B1 (commodity depends on:– Natural dermal systemNatural dermal system
•(Epidermis, cuticle, stomata, lenticles)(Epidermis, cuticle, stomata, lenticles)– Added barriers (surface coating, film wrapping)Added barriers (surface coating, film wrapping)
O2 CO2
N2 C2H4
H2O Heat
B1
The Commodity of Its Environment
• B2 (package) depends on:B2 (package) depends on:– Permeability of packaging materialsPermeability of packaging materials– Ventilation openingVentilation opening– Plastic linersPlastic liners
O2 CO2
N2 C2H4
H2O Heat
B2
Cultivars Treatments
Brown Turkey Air
Kadota CA (6% O2 = 17% CO2)
Mission
CA = Controlled AtmosphereCA = Controlled Atmosphere
Cultivars
Storage @ 32ºF
(days)
Storage @ 32ºF
(days)
Brown Turkey
31 1
Kadota 39 2
Mission 19 3
27
Sound (%) ‘Kadota’
20
30
4050
60
70
8090
100
Sou
nd (
%)
0
10
0 1 2 3
Days at 68°F Shelf life After 31 Days at 32°F
Air CA
Decay (%) ‘Kadota’
0
20
40
60
80
100
0 1 2 3
Days at 68°F Shelf life After 31 Days at 32°F
So
und
(%
)
Air CA
Off Color (%) ‘Kadota’
Air
0
10
20
30
40
50
60
70
80
90
100
0 1 2 3
Days at 68°F Shelf life After 31 Days at 32°F
So
un
d (
%)
CA
Conclusions
• Decay incidence was reduced and Decay incidence was reduced and delayed by the CA treatment in the three delayed by the CA treatment in the three tested cultivars.tested cultivars.
• In ‘Kadota’, a yellow skin cultivar, CA In ‘Kadota’, a yellow skin cultivar, CA reduced the “off color” incidence thus, reduced the “off color” incidence thus, increasing the percentage of sound fruit.increasing the percentage of sound fruit.
• As a next step, commercial and practical As a next step, commercial and practical application of CA-packaging in the fresh application of CA-packaging in the fresh fig industry should be attempted. fig industry should be attempted.
