UC Weed Research & Information Center

WarAgainstWeeds podcast

Broomrape podcast interview

February 4, 2026
By Brad Hanson
Some of my weed science extension colleagues in the midwest have a podcast called War Against Weeds  supported with funding from the North Central IPM Center.  I was interviewed on the podcast a few years ago about herbicide resistant weeds in orchards.  Earlier this week, they invited me back…
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American pondweed with emerged inflorescences. Submerged or floating-leaved aquatic plants with roots within the soil sediment.
UC Weed Science (weed control, management, ecology, and minutia): Article

UCCE Sutter-Yuba Advisors to Participate in Weed Management Area Project

January 30, 2026
By Whitney B Brim-Deforest, Troy L Clark
UCCE Sutter–Yuba is pleased to announce the launch of a new collaborative project with the Sutter and Yuba County Agricultural Commissioners’ Offices focused on the identification and management of invasive weed species in the region. As part of this effort, this project will be coordinating ongoing mapping…
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Fig. 6. Adoption of herbicide spot application (A) and herbicide spray line outside the mulch line/tree rows (B) in a conventional walnut orchard site where walnut leaf mulch was implemented for weed management.

Response of Walnut Leaf Mulch for Weed Management

September 22, 2025
By Clebson G Goncalves
     The use of walnut leaf biomass as a natural mulch and an eco-friendly practice can help prevent weed seed germination by excluding light and/or acting as a physical barrier that prevents weed emergence. Beyond that, several studies have shown potential allelopathic effects of juglone and…
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Brad Hanson lecturing at Weed Science School 2023
UC Weed Science (weed control, management, ecology, and minutia): Article

Weed Science School 2025

September 4, 2025
By Sam Romano
 Weed Science School is less than two weeks away! Join the UC Davis Weed Research and Information Center for this 2.5 day course. Learn through lectures and laboratory demonstrations at the Bowley Plant Science Teaching Facility at 1200 Extension Center Drive in Davis, CA on September 16-18, 2025.Weed…
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DPR’s New 2025 License Renewal and CE Verification Process

August 29, 2025
By Chris J McDonald
It’s that time of the year to start preparing for license and certificate renewal season for pesticide applicators with the California Department of Pesticide Regulation (DPR). Applicators should have received their renewal notice in the mail (and if not, then please contact DPR at LicenseMail@cdpr.ca.gov)…
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picture of Fennimore retirement June 2025

UCCE Weed Specialist Steve Fennimore retires

July 31, 2025
By Brad Hanson
Sharing a link to an article posted by the UC Davis Department of Plant Sciences recapping the 28 year career of Cooperative Extension Weed Scientist Dr. Steve Fennimore.Here's a directly link to that article: https://www.plantsciences.ucdavis.edu/news/fennimore-retirement  As a colleague of Steve…
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broomrape methods

Branched broomrape hand weeding and heat treatment

July 21, 2025
By Brad Hanson
Branched broomrape hand weeding and heat treatmentPershang Hosseini, Magdalene Burgess, Rohith Vulchi, Ni Tang, Brad Hanson (UC Davis) IntroductionBranched broomrape (Phelipanche ramosa) is an obligate root parasitic weed that can affect a wide range of crops, most notably processing tomato in…
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CWSS Research Update (July 2025)

July 17, 2025
By Brad Hanson
The California Weed Science Society (CWSS) publishes a twice-yearly "CWSS Research Update and News" newsletter as one of the society's publications.  The July 2025 issue just went online and is available here: https://cwss.org/wp-content/uploads/2025/07/CWSS_Research_Update-July-2025.pdf This issue…
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Singh_Mandeep

Meet our New Agronomy Advisor, Mandeep Singh

July 10, 2025
By Mandeep Singh
My name is Mandeep Singh, and I’m honored to serve as the Agronomy Advisor for Sacramento, Solano, and Yolo counties, based at the UCCE Capitol Corridor office in Woodland. From an early age, I was involved in managing row crops like alfalfa, wheat, cotton, rice, sorghum, and oats, as well as caring for…
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QR code for survey

Survey on Weed Control Technologies for Tree and Vine Crops

May 6, 2025
By Brad Hanson
Note: I'm sharing a survey request related to grower and industry needs related to novel weed control technologies in orchards, vineyards, and other perennial specialty crops.  Our team of research collaborators is developing this information as a first step towards a future coordinated national…
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Four men in weedy area. One is holding a measuring container while another sprays liquid into it from a wand attached to a backpack sprayer. A third person holds a clipboard and the furth holds a stopwatch.
UC Weed Science (weed control, management, ecology, and minutia): Article

New Online Course: Calibrating Herbicide Applications for Non-Agricultural Areas

April 14, 2025
By Cheryl A Reynolds
Calibration might sound intimidating, but it’s critical for safe and effective herbicide application. Proper calibration ensures that the correct amount of pesticide is applied to an area while achieving the desired level of pest control. To support land managers and pesticide applicators, the UC Statewide…
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Late Rains, Small Plants, Fast Phenology

April 4, 2025
By Chris J McDonald
Originally Posted April 1, 2025. This year in Southern California the rainy season got off to a late start. Southern California has received about one half of the average precipitation total as of this writing (and that's not an April fool's joke). Last year we had over 50% more rainfall than the…
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webinar video on electric weed control in organic perennial crops

April 2, 2025
By Brad Hanson
A quick repost to share a link to a recent January 14, 2025 webinar on Electric Weed Control in Organic Perennial Crops. The webinar was part of a multi-state research and extension project that includes researchers from Oregon State University, Cornell University, and UC Davis and outreach support from…
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img1

WeedCut: BMPs for herbicide application techniques

April 2, 2025
By Brad Hanson
Sharing a recent post from the California Invasive Plant Council (Cal-IPC) about a new page on the WeedCUT online decision support tool. -Brad--------------------------------------------------------------------New WeedCUT Feature: BMPs for Herbicide Application Techniques   Confused about…
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Welcome to the Weed RIC

Please visit the main

UC Weed Research and Information Center
website at: https://wric.ucdavis.edu

The UC Weed Research and Information Center (Weed RIC) is an interdisciplinary collaboration that fosters research in weed management and facilitates distribution of associated knowledge for the benefit of agriculture and for the preservation of natural resources.

Employment opportunities

Ecological Pest Management Program Specialist
Company: Community Alliance with Family Farmers (CAFF)
Location: Davis, CA
Date Posted: 12/1/2020
Closing Date: 12/5/2020

 

 

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