Pest Management

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Adult japanese beetles, one with two macrotype parasite eggs of Hyperecteina aldrichi (Tachinidae) on its thorax
Pests in the Urban Landscape: Article

Protect California from Invasive Species

June 2, 2026
By Yulie Velez
Help raise awareness of invasive species by participating in the California Invasive Species Action Week (CISAW) held June 6-14, 2026! Invasive species are non-native pests that can negatively impact our waters, native ecosystems, agriculture, health, and economy. Each day during the week, UC IPM will…
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Hand and arm covered with glove and long sleeve spraying clear mist from a bottle onto a green shrub.
Pests in the Urban Landscape: Article

Understanding Pesticides

June 2, 2026
By Belinda Messenger-Sikes
Many tools are available to help gardeners, pest management professionals, and growers practice sustainable pest management without the use of pesticides. Sometimes, however, a pest infestation is too high or nonchemical methods haven’t worked, so the next solution might be to use a pesticide. Pesticides are…
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Glassy-winged sharpshooter adult and (out-of-focus) nymph on green lemon twig.
Pests in the Urban Landscape: Article

Purchased a Grapevine at Costco in N. CA Recently? Read This!

May 28, 2026
By Karey Windbiel-Rojas
Updated May 29, 2026 at 4:30pmAn invasive insect called the glassy-winged sharpshooter (GWSS) has been found on grapevine shipments sold at select Costco locations in Northern California between April 21 and May 21, 2026. Note that the timeframe for grapevine plants sold at Costco has been extended to April…
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Pruning out old roses with bypass pruners.
Pests in the Urban Landscape: Article

Jump into Summer with these IPM Webinars!

May 21, 2026
By Yulie Velez
Looking to keep your brain stimulated this summer? Need information about garden pests? Join us every third Thursday of the 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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Emerald Ash Borer adults emerging from a tree.
Pests in the Urban Landscape: Article

Emerald Ash Borer Awareness Week is May 17-23, 2026

May 15, 2026
By Cherie Shook
Every year, Emerald Ash Borer Awareness Week reminds us that one small insect can have a massive impact on our communities. The emerald ash borer (EAB) is an invasive metallic green beetle that has caused the death of millions of ash trees across North America, killing nearly 100% of unprotected street trees…
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A long, slender, light brown insect that resembles a stick walking on a tree branch.
Pests in the Urban Landscape: Article

Stick Insects Are Cool but Can Damage Your Plants

May 5, 2026
By Belinda Messenger-Sikes
Have you ever seen a walking stick insect, maybe in a museum display or at an entomology demonstration? They look just like twigs and are fascinating creatures. This makes them popular as pets in classrooms and homes. However, if pet walking sticks are accidentally or purposefully let out of their cages,…
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UC Master Gardeners of the Lake Tahoe Basin: Article

Central Sierra: Leafy Greens Growing Instructions

April 27, 2026
Growing Kale and Collard Greens in the GroundChange planting location, no replanting for 2-4 years Full sun spring/fall, shade in summer Make sure seedling and planting location are moist and fertile before transplantingGently massage roots of kale before planting but gentle root care for the…
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