Pests

Small, reddish-brown insect clear wings, each with a dark spot near the tip, and a dark brown thorax with gray or black longitudinal stripes and a white crescent-shaped spot.
UC Ag Experts Talk Webinar Series: Event

Webinar: Updates on Major Olive Pests and their Management in California

Oct 15, 2025

This webinar is part of the UC Ag Experts Talk series. Dr. Sudan Gyawaly, Area Integrated Pest Management Advisor with the University of California Cooperative Extension in Butte, Sutter-Yuba, Colusa, Glenn, and Tehama Counties, will discuss an overview of the current knowledge of major olive pests and their…
UC Ag Experts Talk Webinar Series
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Small pink and translucent mite with eight legs, four stretched to the front and four stretched back, on a pale orange surface.
UC Ag Experts Talk Webinar Series: Event

Webinar: Citrus Leprosis Threat, Mites, and Mite Management

Aug 27, 2025

Presenters: Dr. Sandipa Gautam, Cooperative Extension Area Citrus IPM Advisor, UC Agriculture and Natural Resources; Dr. Kris Godfrey, Project Scientist, Contained Research Facility, UC Davis; Dr. Daniel Carrillo, Assistant Professor, Entomology & Nematology Department, University of Florida; Tera Pitman…
UC Ag Experts Talk Webinar Series
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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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A close-up of a California burclover plant showing deep green compound leaves with 3 leaflets, small yellow flowers, and green, round, spiny seeds.

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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The green foliage of a small sycamore tree coated with fluffly, white patches of powdery mildew fungus.

What's That Powdery Stuff on My Plants?

March 5, 2026
By Belinda Messenger-Sikes
Have you seen white powdery-looking patches appearing on the leaves of your roses or sycamore trees? While home gardeners may be familiar with this sign of the plant disease powdery mildew on their veggies, ornamental plants and landscape trees can also be infected. In addition to those powdery spots, the…
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Japanese beetle. Credit: D. Cappaert, Bugwood.org)

National  Invasive Species Awareness Week 2026

February 18, 2026
By Lindsey Hack
This week (February 23-27, 2026) is National Invasive Species Awareness Week (NISAW), an event dedicated to raising awareness about invasive species, the threats they pose, and how we can slow their spread. When it comes to invasive species, your actions can have a big impact! What Can You Do? Take…
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Short mushrooms growing at the edge of a lawn along mowing strip. Caps of mushrooms are whitish to light brown and appear cracked. Caps are flat with edges rolled down slightly.

Rains Bring Lawn Mushrooms

January 9, 2026
By Belinda Messenger-Sikes
Winter rains and damp conditions in many parts of California may have brought a surprise visitor to your lawn: mushrooms! A few mushrooms sprouting in your lawn can be a good sign: it means there's plenty of organic matter in the soil. But if patches of mushrooms are sprinkled across your lawn, something…
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A close-up of shiny gold and green holiday ornaments and multicolored lights hanging on a fir tree with bushy, dark-green leaves (needles).
Pests in the Urban Landscape: Article

Happy Holidays from UC IPM

December 22, 2025
By Lindsey Hack
From the UC IPM Urban and Community team, we’d like to wish you a happy holiday season! As we reflect on this past year, we’d like to express our gratitude to all of you for joining us to learn about pest management around the home and garden.  This year, we’ve connected with you in various ways:…
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