Pests And Weeds

UC Master Gardeners of El Dorado County: Event

Central Sierra: Starthistle (EDC MG)

Nov 8, 2025

Come learn about this invasive weed that has taken over large portions of California’s range land and urban landscape. Learn about its origins, how it moves, why it is so difficult to control, how to overcome these difficulties, control methods, and how to design an effective control program.
UC Master Gardeners of El Dorado County
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Green alfalfa field with scattered blooms of purple flowers blowing in the wind.
UC Ag Experts Talk Webinar Series: Event

Webinar: Pest Management in Alfalfa, Small Grains, and Garbanzo Beans

Sep 24, 2025

This webinar is part of the UC Ag Experts Talk series. Dr. Michelle Leinfelder-Miles, Delta Crops Resource Management Advisor with the University of California Cooperative Extension, San Joaquin County, will discuss the principles of Integrated Pest Management and pest management in alfalfa, small grains,…
UC Ag Experts Talk Webinar Series
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Oval-shaped insect with triangular marking on its back with membranous wings
UC Ag Experts Talk Webinar Series: Event

Webinar: Field Crop Insect and Weed Management Updates

Aug 6, 2025

This webinar is part of the UC Ag Experts Talk series. Nicholas Clark, Associate Cooperative Extension Area Agronomic Cropping Systems and Nutrient Management Advisor, will give an introduction of agronomic cropping systems and their current weed and insect pest management challenges. He will describe…
UC Ag Experts Talk Webinar Series
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Tall, green stalks of giant reed towering over two humans standing in front.
Pests in the Urban Landscape: Article

Keep Invasive Plants Out!

June 11, 2025
By Lindsey Hack
The golden flowers of French broom covering hillsides and the tall, striking stalks of pampasgrass stand out on trails and roadsides. These plants may be beautiful, but they are invasive and harm California’s natural landscapes.  Invasive plants outcompete and crowd out native plants, damaging…
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Bermuda buttercup infesting a bed of landscaped plants.
Pests in the Urban Landscape: Article

Spring is in the Air, and Oxalis is Everywhere

April 17, 2025
By Lindsey Hack
Bermuda buttercup (Oxalis pes-caprae), also called buttercup oxalis or sourgrass, might be a familiar sight in winter and spring, particularly to those who live in coastal regions or the Sacramento Valley. Some people enjoy seeing this plant’s cheerful yellow flowers pop up in their spring gardens, but for…
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Master Gardener Information Desk for home gardener advice
UC Master Gardener Program of Sonoma County: Page

Information Desk

Get free expert help with garden problems and advice from the UC Master Gardener Program of Sonoma County Information Desk supported by research-based information from the University of California and other academic or government institutions.
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UC Master Gardener Program of Alameda County: Page

Purslane, Weed It or Eat It

Purslane is a nutritious plant that has been grown for more than 4,000 years as a food and medicinal plant and is still cultivated in many places today.
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