Vegetables Produce Facts English
Recommendations for Maintaining Postharvest Quality
Maturity & Quality
Edible-Pod Peas include both Oriental or Asian (also Snow) flat type pods, harvested when the seeds are very small and immature, and the Snap or Sugar Snap Pea which resemble a typical fresh garden pea but with smaller seeds.
Snow Peas are selected for size and maximal recovery of bright green, flat pods with minimal seed enlargement. Older and yellowing pods are avoided by careful hand-harvesting.
Edible-pod peas should be uniformly bright green (light to deep green but not yellow-green), fully turgid, clean, and free from damage (Thrip injury, broken pods). The stem and calyxes should be green and there should be very few blossoms attached to the pods.
Temperature & Controlled Atmosphere
To calculate heat production, multiply ml CO2/kg·hr by 440 to get BTU/ton/day or by 122 to get kcal/metric ton /day.
Rates of Ethylene Production
Peas are moderately sensitive to exogenous ethylene. Accelerated yellowing and decay will result from extended exposure to low levels of ethylene during distribution and short-term storage. The calyx is more sensitive to ethylene than the pod.
Reports vary widely in the benefit of CA for Sugar and Snap Peas. Atmospheres of 2 to 3% O2 and 2 to 3% CO2 are considered by UC Research to offer the best, but moderate, benefit to peas beyond that of rapid cooling and proper storage. Low O2 may promote off-flavors and off-odors. Other studies report that 5 to 7% CO2 extends pod quality at 0°C.
Physiological and Physical Disorders
Use of Materials
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The information in this fact sheet represents our best understanding of the current state of knowledge at the time of the latest update, and does not represent an exhaustive review of all research results. Links to any of these UC Postharvest Technology Center pages are permitted, but no endorsement of the linking site or products mentioned in the linking page is intended or implied by such a link.
How to Cite
Author(s) names. Initial publication or update date (located at the top). Title. Link to the specific Produce Fact Sheet webpage (Accessed date)
Example: Cantwell, M. and T. Suslow. 2002. Lettuce, Crisphead: Recommendations for Maintaining Postharvest Quality.