Pest Management & Plant Health

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Several large, brilliant purple flowers scattered over dense, deep green leaves.

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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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.
Pests in the Urban Landscape: Article

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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Colony of bright yellow, pear-shaped aphids with black legs, antennae, and cornicles (tail pipes) on their abdomens surrounded by exoskeletons on a green leaf.

Top Ten Pests of 2025

January 8, 2026
By Yulie Velez, Karey Windbiel-Rojas
Forget Spotify Wrapped – can you guess which pests received the most hits on UC IPM’s Pests Notes page this year? Here are the top ten pests that made your year: (1) Carpet Beetles  For several years, carpet beetles have been in the top 5 on our playlist. Immature carpet beetles feed on…
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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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Many orange fruits and leaves photographed from above.
Pests in the Urban Landscape: Article

Don't Give Pests This Holiday Season

December 16, 2025
By Lindsey Hack
Winter is peak citrus season, and a time when many people gift their home-grown fruit to friends and loved ones. This holiday season, we would like to remind everyone that harmful invasive pests can move to new areas on citrus fruit. There are several active quarantines in California aimed at slowing the…
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A paved walking path dotted with orange, fallen leaves, bordered by grass and shaded by trees.

2026 Webinars from UC IPM

December 10, 2025
By Lindsey Hack
The new year is just around the corner, and along with it will come new Urban and Community IPM Webinars! Join us every third Thursday of each month from 12:00 to 1:00pm PST to learn about a wide range of urban pest management topics. This series is free and open to the public but advance registration is…
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Houston Wilson, in baseball cap, gestures while doing a talk in the shade of an orchard
Employee Spotlights: Article

Wilson brings science to California’s high-priority crops

November 21, 2025
By Michael Hsu
Based at the Kearney Agricultural Research and Extension Center near Fresno, UC Cooperative Extension specialist Houston Wilson and his team develop integrated pest management (IPM) strategies for some of California’s most valuable agricultural commodities.
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A small brown mouse poking it's head and front paws out from a hole in the ground.
Pests in the Urban Landscape: Article

Management of Urban Rats and Mice

November 21, 2025
By Niamh M Quinn
Let’s be real—California's rodent issue is extensive. In some areas, it may seem like an infinite sea of rats and mice. Commensal rodents, those that live among and benefit from association with humans, significantly affect public health, environmental sustainability, and urban infrastructure.  …
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