UC Weed Science (weed control, management, ecology, and minutia)

Screen from the course, Module 2: How Herbicides Injure Plants with cartoon person and text bubble “Click on each button to learn more”. Person is pointing to the images demonstrating different herbicide transport routes including contact (e.g. paraquat), foliar systemic (e.g. simazine), below ground systemic (e.g. mesotrione), and combination of transport routes (e.g. 2,4-D). Each example is accompanied by a photo of symptoms caused by the given herbicide on prune.

New online course on diagnosing herbicide injury now available

October 1, 2021
By Petr Kosina
A brand-new online course on Diagnosing Herbicide Injury focusing on how an herbicide injury situation can arise, what information can help diagnose symptoms during field investigations, and what tools are available to you, is now available from the UC Statewide Integrated Pest Management program (U...
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Dr. Kassim Al-Khatib at the CA Rice Field Day 2021

California Rice Field Day is back!

September 16, 2021
By Gale Perez
The California Rice Field Day is back! The annual event, sponsored by the California Cooperative Rice Research Foundation and the California Rice Board, returned to in-person status on August 25, 2021 after being held virtually in 2020.
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Photo 1. Oakleaf goosefoot: above and lower leaf surfaces shown

Oakleaf goosefoot a new weed concern in the Salinas Valley

September 12, 2021
By Richard F Smith
Richard Smith is the University of California Cooperative Extension Monterey County Vegetable Crop Production and Weed Science Farm Advisor. He also covers Santa Cruz and San Benito counties. Oakleaf goosefoot (Chenopodium glaucum) is a new weed to the Salinas Valley that has become more prevalent.
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healthy pasture outcompetes weeds

Range and Pasture Weed FAQs

September 7, 2021
In the 5 years I've been with UCCE, I have received a few recurring weed-related questions. I've certainly had some unique requests, like how to deal with fig trees invading a livestock water pipeline, or whether filaree might be harmful to guinea pigs (it isn't).
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