Colusa County
University of California
Colusa County


Rice is one of the major crops grown in the Sacramento Valley of California. Aproximately 500,000 acres are planted yearly.

General objectives of the Rice Farming Systems program are:

  • To develop and implement educational and applied research programs appropriate for the rice industries in Colusa, Glenn and Yolo Counties.
  • To collect and disseminate relevant and current information that will improve rice production and maximize net farm income, while conserving natural resources and safeguarding the environment.

Luis Espino conducts the Cooperative Extension Rice Farming Systems program in Colusa, Glenn and Yolo Counties. Luis has a Ph.D. in Entomology (2007), and M.Ag. (1999) and a B.S. (1996) in Agronomy . Luis can be contacted at the Colusa office at 530-458-0578 or 530-635-6234, or at

Rice field Glenn county


Photo of Luis Espino Luis Espino
Title: Rice Farm Advisor
Specialty: Entomology, Agronomy
Cooperative Extension Colusa County
PO Box 180, 100 Sunrise Boulevard
Suite E
Colusa, CA 95932
Phone: (530) 458-0578


UC Rice Blog

  • New Weedy Rice Materials for the 2017 Season

    Added June 25, 2017
    Poster and pamphlet for weedy rice identificaiton in California

    Over the past year, weedy rice has become a top issue in California rice, both for individual growers and for the industry as a whole. Working together, the University of California Cooperative Extension and the California Rice Commission have come...

  • Some Weeds Ahead Of Rice This Year

    Added June 22, 2017
    Mexican sprangletop that has already set seed (about 20 days after rice seeding)

    I went out on a few farm calls in the past week, and have noticed a trend. Due to the unusually wet weather this spring, some of the weeds are already producing seed out in the field! This occurs when the field was moist or wet in the spring, and was...

  • Armyworms Are Back

    Added June 21, 2017
    IMG 5433

    I have received reports of significant defoliation due to armyworms from several areas: Glenn, Colusa, Butte and Yolo counties. In most areas the defoliation is severe but the area affected within fields still small. I inspected a field in...

  • Armyworm Monitoring 2017 - Week of June 19

    Added June 20, 2017

    Moth numbers have increased since the week of June 12, specially in the Colusa trap. The degree day model predicted worms in the fifth instar by June 22; I'm starting to receive  reports of worms in Colusa, Glenn and Butte counties. Keep your...

  • Armyworm update week of June 12

    Added June 12, 2017

    The number of moths trapped has increased in all locations, except in the North Sutter one (which was already high to begin with). In most fields the rice is still in the three to five leaf stage. In the Colusa and Glenn fields I was able to observe...

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