UC Weed Science

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INSV infected romaine lettuce with necrosis on older leaves. (Photo credit: Daniel Hasegawa)

Article

Weeds as reservoir for Impatiens Necrotic Spot Virus (INSV)

October 10th, 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. Weeds are an important host of Impatiens Necrotic Spot Virus (INSV) in the Salinas Valley.

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Figure 1. Dalmatian toadflax, Linaria dalmatica, in flower. Photo by Baldo Villegas, CA Dept. of Food and Agriculture

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Successful Control of Dalmatian toadflax (Linaria dalmatica) with Natural Enemies

October 3rd, 2021

Mike Pitcairn is with the California Dept. of Food & Agriculture (mike.pitcairn@cdfa.ca.gov). Lincoln Smith (link.smith@usda.gov) and Patrick Moran (patrick.moran@usda.gov) are with USDA Agricultural Research Service.

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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.

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New online course on diagnosing herbicide injury now available

October 1st, 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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Managing Weeds in Grasslands and Rangelands banner

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EVENT :: Managing Weeds in Grasslands and Rangelands (online event)

September 30th, 2021

Managing Weeds in Grasslands and Rangelands (online event) Tuesday, October 19, 2021 9:00 AM-12:00 PM (Pacific Time) The latest information on weed control will be presented at the Managing Weeds in Grasslands and Rangelands online event.

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Dr. Kassim Al-Khatib at the CA Rice Field Day 2021

Article

California Rice Field Day is back!

September 16th, 2021

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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