Office (541) 318-1485
Home About PVMI Contact Us
Summer 2022

2022 TriSTate Tour

Aberdeen, ID    September 27th to 29th

Hermiston, OR    October 4th

Klamath Falls, OR    October 5th to 7th

PDF For information on Meeting Times, Hosts and hotels, etc, click here: (PDF)

Seed Potato Germplasm Program

The University of Idaho Seed Potato Germplasm Program is responsible for providing disease free nuclear potato seed and germplasm in the Tri-States and Internationally. Contact Jenny Durrin for more information or to order germplasm or nuclear potato seed of PVMI varieties.

Moscow Lab

The link to the program's website Seed Potato Germplasm Program

New Videos

Bill Schaefer has created a wide variety of short videos that capture the activities of the Tri-State Potato Research and Breeding Program.

The latest features Nora Olsen, describing Storage Management at the University of Idaho's Kimberly facility.

To see this one and other videos, click on the "Videos" button to the left.

The 2021 Tri-State Tour

2021 TriState Tour Selection 3

One of many photos from the Tri-State Selection tour that took place in Hermiston and Klamath Falls during early October. See more photos below

Growing Potatoes? Top Ten Best Practices

See how closely you follow the advice of the experts.

PDF Top Ten Best Practices (PDF)

Northwest Potato Industry: Revised Pest Management Guidelines

Following extensive revision and improvements this spring, the 2018 edition of the Integrated Pest Management Guidelines for Insects and Mites in Idaho, Oregon and Washington Potatoes is now available. Many thanks to Alan Schreiber, leader of this effort since the beginning in 2002, plus the many co-authors and contributors who have been involved over the years.

Andy Jensen, Northwest Potato Consortium Manager.

PVMI Varieties have had their Fingerprints taken!!

Dr. Vidyasagar (Sagar) Sathuvalli, Assistant Professor Potato Breeding and Genetics with his colleagues at Hermiston Agricultural Research and Extension Center (HAREC), Oregon State University, have established the SSR Fingerprints for the PVMI varieties as well as for some other common lines. These are now available.

PDF (PDF) The fingerprinted varieties!

For more information, contact: Sagar on 541 567 6337
or email:

2020 Royalty Form Available For Download

Go to the list of Documents and Agreements... » Off-site link

Tri-State Russets Comparison

A Multi year review by Washington State University of several Tri-State lines shows impressive yields when compared to traditional russets.

Read More... »Off-site link

Potatoes and Diabetes

Researchers at Montana State University have found that several varieties of potatoes could foil type 2 diabetes. Among them is Huckleberry gold. Read the entire article.

PDF (PDF) The Prairie Star, February 5, 2016

PVY, PMTV and TRV Information

At Off-site link you will find information about the potato necrotic tuber viruses Potato Virus Y (PVY), Potato Mop Top Virus (PMTV) and Tobacco Rattle Virus (TRV). This information covers virus and vector biology, symptoms, diagnosis and importantly, the latest recommendations on managing these viruses. Resources such as where to find diagnostic lab testing, cultivar ratings, updated recommended practices for seed potato field inspection, effects on tuber quality in storage, an infected seed price calculator and more can also be found on the website. There is an excellent collection of photographs showing PVY symptoms under a variety of conditions in selected varieties as well.


New Clearwater Russet Management Information

Consider physiological maturity (PM) when deciding when to harvest:

• Recognize that PM in Clearwater occurs when the crop still has ~60% green vines.

• At PM, approximately half the crop will be in late stage bulking and the other half will be under dead vines in the skin-set phase of maturation where physiological age is accelerated by temperature.

• The challenge is to minimize tuber exposure to diurnal fluctuations in soil temperature under dead vines without sacrificing the yield potential for tubers still bulking under green vines.

To maximize both yield and storage potential in ‘green vine’ harvest, plan to lift the crop within 10-18 days of PM.

For ‘vine-kill’ harvest, desiccate at ~155 DAP (~40 - 45% green vines) and harvest 7 - 14 days later.

Adhere to best management practice recommendations for minimizing bruise and other mechanical damage for bruise-free incentives and to minimize dry rot potential.

Prolonged maturation period under dead vines subjects the crop to diurnal fluctuations in temperature that accelerates tuber aging, which can affect retention of quality – dormancy length, weight loss potential, sugar buildup.

Clearwater is resistant to low temperature sweetening (LTS) and means increased tolerance of delayed harvest beyond PM for maintaining low sugars and process quality during storage. Still tubers should be harvested as close to PM as possible (e.g., within 10-18 days of PM) to maximize retention of process quality during long-term storage.

See the complete article for additional information.

The University of Idaho and Washington State University have both published new Cultural Management guides for Clearwater Russet. Go to the variety page for Clearwater to find them both.

Teton Russet?

Updated Teton Russet Management Guidelines for Idaho reflect growth cracks dependent on irrigation.

PDF Updated Teton Management Guidelines, February 2020 (PDF)

Nitrogen Rates for PVMI Varieties

Suggested Full-Season Nitrogen Rates and Associated Petiole N03-N Values for Twelve Potato Varieties when Grown in the Columbia Basin of Washington and Oregon.

PDF Click here to retrieve the article from Mark Pavek at WSU (PDF)

New Website and Refurbished Research Library

Since 2012 the Washington, Idaho, and Oregon potato commissions have cooperated in research funding and management, and have called this cooperative venture the Northwest Potato Research Consortium. The Consortium has been represented on the Web by, which included the ‘research library’ developed by the WSPC in the 2000s. Recently, a long-awaited redesign and reprogramming of the website was completed and is now live online.

For those of you with research library passwords, your old login will work on the new site. For those without a login and password, there is a user-friendly means to request a password. I encourage everyone to have a look, and of course offer feedback anytime!

Andy Jensen, Consortium Manager.

New Cultural Management Recommendations

. . . have been released for Mountain Gem Russet for the Columbia Basin of WA and OR

Go to the Varieties page.

Payette Russet Storage

Check out the recently released Payette Russet Storage Bulletin.

PDF (PDF) Bulletin CIS 1220

Zebra Chip (ZC)

Essential information about Zebra Chip (ZC) in the Columbia Basin: Identification, Late Season Control, and Storage

 Read More... »

La Belle Russet (A06021-1T)

The La Belle Russet Flyer has been updated.

PDF If you're growing or planning to grow this variety, click here. (PDF)


Tri-States Specialty Review

USDA reviews Tri-State Specialty Potatoes AmaRosa, Purple Fiesta and TerraRosa

Click here, to link to the reportOff-site link

The 2021 Tri State Tour

2021 TriState Tour Selection 1 2021 TriState Tour Selection 2 2021 TriState Tour Selection 4 2021 TriState Tour Selection 5