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WSU Tree Fruit


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 a way to easily disseminate that content online. To request articles please use our Contact Form.

Pages within the Postharvest Section

Food Safety

We refer to the WSU Food Safety website which focuses on fresh produce safety information resources and training.

Export & Quarantine

This page gives a short summary of export and quarantine issues and refers visitors to our companion website for more in-depth information.

Defects & Disorders

This section is undergoing major revisions to include new resources – both for print orders and online guides.

Storage & Packing

This page in undergoing a major revision and has been temporarily removed.


We give a general summary of shipping methods with resources links.