Pests And Weeds

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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A close-up of a California burclover plant showing deep green compound leaves with 3 leaflets, small yellow flowers, and green, round, spiny seeds.
Pests in the Urban Landscape: Article

Shamrocks, Clovers, or Weeds?

March 18, 2026
By Lindsey Hack
St. Patrick’s Day makes us think about shamrocks and all things green. With recent warm weather following winter rains, your lawn or garden might be dressing up for Saint Patrick’s Day and Spring with clovers and other weeds.  Clovers begin to germinate in the fall and continue throughout winter…
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Person wearing gloves pouring liquid from a measuring cup into a spray bottle on cement.
Pests in the Urban Landscape: Article

Upcoming Webinars from UC IPM

February 9, 2026
By Yulie Velez
If you missed our first Urban & Community IPM webinar of the year, Pests of Backyard Chickens, don’t fret, we have more for you! Join us every third Thursday of the month from 12:00pm to 1:00pm PT to learn about a wide range of urban pest management topics. This series is free and open to the…
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Several large, brilliant purple flowers scattered over dense, deep green leaves.
Pests in the Urban Landscape: Article

When Ornamentals Escape

January 20, 2026
By Cherie Shook
You might be surprised to learn that a few of your favorite ornamental plants are invasive to California and can “escape” your yard causing big problems in the wild. When plants escape landscape and garden boundaries, it is often due to seed distribution or aggressive roots. An invasive plant species can…
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UC Master Gardeners of Placer County: Article

Stopping Crabgrass Before It Starts

December 18, 2025
By Gay Wilhelm and Trish Grenfell, UC Master Gardeners of Placer County Q: What can I do to stop crab grass in my lawn? A: Who hasn’t done combat with crabgrass? But there is help and NOW is the time to take action. Using a pre-emergent herbicide in mid to late February will help…
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