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Postharvest is a complex topic encompassing orchard practices, harvest methods, quality evaluations, storage regimes, sanitation practices, food safety, pathology,  handling and packing practices, transportation, and even marketing and export concerns. WSU researchers have been active in all of these areas and are at the forefront of developing new technologies used in various aspects of postharvest. WSU researchers also work closely with researchers from both other universities, such as Oregon State University, and USDA-ARS to maximize efforts for the  PNW tree fruit industry.

Postharvest Defects & Honeycrisp Disorders Posters


Larson4-1-03Postharvest Information Network

The old Postharvest Information Network website has been retired along with the aging server that hosted the site. We realize that this is an inconvenience to many of you who relied on that source for the articles, reports, and news articles provided by Dr. Kupferman. Much of that old content is still available but will need to be requested until we have developed a new archive on the Postharvest Systems website. To request articles please contact Chris Hedges, Postharvest ITT.

Pages within the Postharvest Section

WA 38 Defects Guide

Visual guide for WA 38 common defects and unique characteristics near harvest and during storage. this page is cross-listed under the WA 38 Resources section.

Defect Image Rotators

Defect image rotators are interactive 360-degree rotating images with captions for about 70 different defects, disorders and diseases found on apple. This link is for the categorized index page with the access links to each rotator.

Postharvest Diseases

This section covers the identification and management of postharvest rots.

Diseases ID Guide

Image galleries of the most common postharvest diseases affecting apple and pear.

Export & Quarantine

Contains overview information on exporting tree fruit shipments and includes contact information.


General references on shipping of apple, pear, and sweet cherries.


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