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

  • 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...

  • High Levels of Blue Alfalfa Aphid Found in Tulelake Alfalfa Fields

    Added April 1, 2015
    Fig. 1A  Pea Aphid

    Tuesday afternoon (3/31) Nick Macy from Macy's Flying Service and IREC Director Rob Wilson looked at some alfalfa fields in the Tulelake area that exhibited poor growth this spring. The severe stunting looked similar to stem nematode—a common...

  • 2015 Outlook for Seedcorn and Onion Maggot

    Added April 1, 2015
    Maggot Flies Trapped

    Water availability is still uncertain, but the probability of maggots infesting onion fields this year is nearly guaranteed. Several experiments were conducted at IREC from 2011 to 2013 examining insecticides applied at planting for protecting onion...

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