Intermountain Research and Extension Center
Intermountain Research and Extension Center
Intermountain Research and Extension Center
University of California
Intermountain Research and Extension Center


Four miles from the Oregon border, in Tulelake, California, the Intermountain Research and Extension Center (IREC) is one of nine centers under the University of California Division of Agriculture and Natural Resources. IREC supports and facilitates University of California research in field and vegetable crops grown in northeast California, and supports conservation of natural resources in the Klamath Basin.

Please explore our website. Specific contents include announcements, calendar reminders, local weather, biological data, and past & current research reports.

Opportunities for Research and Extension at IREC

Center Highlights 2014

Did You Know?

Intermountain REC Blog

  • Farm Advisor Notes from the Field

    Added May 20, 2015
    Untreated and Treated Onion Plots

      With the much needed recent rain, we had some time this morning to provide a short update on some of the observations we've made in the crop fields around Tulelake this spring. Onions 2015 appears to be a terrible year for seed corn maggot...

  • Additional Thoughts on Blue Alfalfa Aphid Management in the Klamath Basin—Effectiveness of Cultural Controls

    Added April 21, 2015
    Flooded Alfalfa Field

    As mentioned in a previous posting, the blue alfalfa aphid (BAA) situation in the Klamath Basin this year is unprecedented. To my knowledge, we have never before experienced such high aphid populations on such young alfalfa. There is a lot we don't know...

  • 2015 Crop Water Use Table is Available Online

    Added April 15, 2015

    The 2015 Crop Water Use Table is updated and available on-line on the IREC website.  This table is a useful tool to track daily water use for crops grown in the Klamath Basin. Keep in mind values shown in the table are estimates of crop water use...

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