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
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Rice Field Arial Weed Management in 2023: what can we expect?
Coming out of 2022, where roughly half of all California rice fields were left fallowed last year, and others may have been fallowed for two seasons, many of us have questions about what weed...
By Whitney Brim-DeForest
Author - County Director, Sutter and Yuba Counties and CE Rice and Wild Rice Advisor -
ANNOUNCEMENT :: UC Weed Science 2023 events
Have you registered for... Weed Day 2023 link :: https://wric.ucdavis.edu/events/weed_day_2023.html Weed Science School 2023 link ::...
Weed Resources
- Weed Research & Information Center (UC WeedRIC)
- Weed ID Tool
- Cal-IPC: California Invasive Plant Council
- Herbicide Symptoms - UC IPM
- Western Society of Weed Science
- Weed Science Society of America
- California Weed Science Society
- California Department of Pesticide Regulation
- California Department of Food and Agriculture Integrated Pest Control (IPC)

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
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
UC Weed Science Twitter Feed

@WyoWeeds @tedlieu Congressman Lieu, I’d be glad to visit with you if you have an interest in weed management trade… https://t.co/3MBsJMRVr1 Posted 1462 days ago

@LynnSosnoskie Weed dispersal (California burclover if you’re keeping score at home) https://t.co/YFJVfzts8n Posted 1466 days ago