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

Root inhibiting herbicide injury on processing tomatoes

October 17, 2021

By Gale Perez

Root-inhibiting herbicides (like pendimethalin or trifluralin) are soil-applied and pre-plant incorporated as a standard practice for conventional processing tomatoes in the Sacramento Valley.

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

Weeds as reservoir for Impatiens Necrotic Spot Virus (INSV)

October 10, 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

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

October 3, 2021

By Gale Perez

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.

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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Managing Weeds in Grasslands and Rangelands banner

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

September 30, 2021

By Gale Perez

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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