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Weed Science

The Weed Science program, based out of the University of California Cooperative Extension- Napa County office, holds a wealth of weed related information and is a must visit if you are looking to learn more about control tactics or identification. You can also find some important links below:

UC Weed Science Blog
  • Interviews on electric weeding research
    Electric weed control research updates

    From the eOrganic and Performance and Economics of Electric Weed Control in Organic Perennial Crops Project: Electric Weeding Research Updates (Click HERE to see the...

    By Gale Perez
    Posted by - Public Education Specialist
  • Doctoral candidate Matt Fatino, center, is one of the 'weed doctors' who will be available during Picnic Day 2024 to answer people's questions about the pesky plants growing in their lawns, fields and pastures. Whitney Brim-DeForest, left, is a Department of Plant Sciences graduate and expert in rice-field weeds who now is the UC Cooperative Extension County Director for Sutter and Yuba counties. (UC Davis)
    Weed doctors seek solutions for pesky plants

    Hanson: “Some weeds you can only eat once” Dandelions are pretty, but weeds nationwide cost homeowners, farmers, ranchers and land managers tens of billions of dollars each year in...

    By Trina Kleist
    Author - Communications Specialist
    By Gale Perez
    Posted by - Public Education Specialist
  • Our Student Winners! From left to right: Sawyer Claussen, Robert Willmott, Jennifer Valdez Herrera, Erika Escalona, and Stephen Chang
    CWSS: Student Winners and Schlorship Opportunity!

    **** Students, it is the time of year to apply for the CWSS Student Scholarship! Awards will be given to both graduate and undergraduate students ranging from $1,000-2,000. Any students interested...

    By Thomas J Getts
    Author - Weed Ecology & Cropping Systems Advisor
  • Image 1. Avocado weeds
    Weed B Gone and Tree B Gone?

    With all the rain last year, even extending into August and now with the rains since December there is a lot of natural ground cover growing, When it gets out of hand, we call it weedy. It might...

    By Ben Faber
    Author - Advisor
    By Gale Perez
    Posted by - Public Education Specialist
  • WSSA ESA image
    Webinar on how pesticide labels may change to protect endangered species

    Although many of you are already well aware of the upcoming changes to pesticide labels related to the Endangered Species Act, many are not. A quick background can be found in a Weed Science Society...

    By Bradley Hanson
    Author - Cooperative Extension Specialist
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Weed Resources
Photo of John A Roncoroni
John A Roncoroni
Title: Weed Science Farm Advisor, Emeritus
Specialty: Weed Control and Vegetation Management in Perennial Crops, Covercrops and Aquatic Weed Control
Address:
UC Cooperative Extension
1710 Soscol Avenue
Suite 4
Napa, CA 94559-1315
Phone: 707-253-4221
Email: jaroncoroni@ucanr.edu
Weed ID Tool

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UC Weed Science Twitter