Pest Management & Plant Health

UC Environmental Stewards: Event

CalNat Bolsa Chica Conservancy course

Apr 25, 2024 - Jun 22, 2024

Full Course Website: https://calnat.ucanr.edu/Take_a_class/Bolsa_Chica_Conservancy/ In 2020, the Bolsa Chica Conservancy became the newest partner organization, and the first in Orange County, to host a CalNat course.
UC Environmental Stewards
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UC Environmental Stewards: Event

CalNat Sagehen Creek Field Station Immersion Course

May 26, 2024 - Jun 1, 2024

Full course website here: http://calnat.ucanr.edu/Take_a_class/Sagehen_Creek_Truckee/ California Naturalist training will introduce you to the wonders of our unique ecology and engage you in the stewardship of Californias natural communities.
UC Environmental Stewards
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UC Master Gardeners of Fresno County: Event

Education Day at the Garden of the Sun

Apr 6, 2024

Saturday, April 6, 2024 Education Day at Garden of the Sun Free event! Master Gardeners will be talking about vegetable gardening, vermiculture, composting and solving plant problems. We will have Gardener's Companions ,Spring Garden Tour tickets, tool sharpening and plants for sale.
UC Master Gardeners of Fresno County
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UC Environmental Stewards: Event

California Naturalist Course with Alameda Creek Alliance

Apr 1, 2026 - Jun 6, 2026

Join us in a California Naturalist Course to become a California Naturalist and Alameda Creek Alliance Stream Keeper. Stream Keepers make observations in the field and collect data on fish species, watch for Salmon and steelhead, and monitor a variety of conditions in the Alameda watershed. Course…
UC Environmental Stewards
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Western yellowjacket black and yellow banded adult top view on weathered picnic table wood.
Pests in the Urban Landscape: Article

What To Do About Yellowjackets

August 26, 2026
By Yulie Velez
Are yellowjackets ruining your outdoor picnic or gathering? Yellowjackets, sometimes called “meat bees”, prey on other insects and scavenge on human food and garbage.  They are more likely to sting if disturbed while foraging. Avoid unpleasant encounters with yellowjacket wasps by following the tips…
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Small moth-like insect with wings broadest in the apical half, mottled, and have a dark brown band around the outer half laying yellow almond shaped eggs on green leaves.
Pests in the Urban Landscape: Article

Asian Citrus Psyllid: Webinar Q&A

August 21, 2026
By Yulie Velez
Following the July 16th webinar Update on Asian Citrus Psyllid in California, our presenter, Dr. Sandipa Gautam, answered live questions from participants. Below are some of the questions asked about Asian citrus psyllid (ACP) and Huanglongbing (HLB) disease. Keep in mind that some of the questions were…
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SoCal Desert Plant Pathology: Article

Onion Downy Mildew Fungicide Efficacy Trial - 2025/26

August 13, 2026
By Ana Maria Pastrana Leon
A fungicide efficacy trial was conducted at the Emerald Seed Co. research farm in El Centro, CA, from September 2025 to March 2026 to evaluate the effectiveness of various fungicide treatments against onion downy mildew (Peronospora destructor) under field conditions. The trial included 9 treatments across 4…
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August pest tips
Pests in the Urban Landscape: Article

August Pest Management Tips

August 11, 2026
By Yulie Velez
Follow these tips for the month of August to prevent pests in your garden and landscapes. To see tips more specific to your region, visit the Seasonal Landscape IPM Checklist on the UC IPM website.  Manage ants around landscapes and building foundations using insecticide baits and trunk barriers…
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red ladybug on a yellow flower
UC Master Gardeners of El Dorado County: Article

Central Sierra: Lady Beetles, a Gardener's Dream

August 10, 2026
By UC Master Gardeners of Central Sierra
Ladybugs are not all the same. There are about 200 species of lady beetles in California. It is important to remember that while all lady beetle species have a similar shape, the color and patterns may differ. Some have spots, others don’t, some are red, and some are grayish. Lady beetles and their…
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