Hero Image

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
  • David Bayer
    In memoriam: Dr. David Bayer

    David E. Bayer, Emeritus Professor in the UC Davis Department of Plant Biology, passed away on January 20, 2024 in Davis, CA. Dr. Bayer earned his B.S and M.S. degrees from Oregon State University...

    By Bradley Hanson
    Editor - Cooperative Extension Specialist
    By James E Hill
    Contributor - CE Specialist
    By Gale Perez
    Posted by - Public Education Specialist
  • Screen Shot 2024-02-26 at 7.44.56 PM
    Wildland Weed Alert: Cape Ricegrass (Stipa capensis)

    Keep an eye out for this potential problem weed in southern California: Stipa capensis. First reported in 1995 in Riverside, this species is native to the Mediterranean and has established in the...

    By Justin Valliere
    Author - Assistant CE Specialist
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
UC Cooperative Extension
1710 Soscol Avenue
Suite 4
Napa, CA 94559-1315
Phone: 707-253-4221
Email: jaroncoroni@ucanr.edu

UC Weed Science Twitter Feed