Mendocino County
University of California
Mendocino County

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

  • Croftonweed or thoroughwort is expanding its range in Marin County

    Added February 22, 2016
    ageratina adenophora3

    Croftonweed (also called thoroughwort) goes by the scientific name Ageratina adenophora or Eupatorium adenophorum. It is native to Mexico and has been introduced to a number of areas around the...

  • Australian weeds

    Added February 19, 2016

    A little something Brad Hanson shared with us...   Australia town consumed by 'hairy panic' weed This is to follow up on Guy's Russian thistle...

Photo of John A Roncoroni John A Roncoroni
Title: Weed Science Farm Advisor
Specialty: Weed Control and Vegetation Management in Perennial Crops, Covercrops and Aquatic Weed Control
UC Cooperative Extension
1710 Soscol Avenue
Suite 4
Napa, CA 94559-1315
Phone: (707) 253-4221


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