Pests & Diseases

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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.
Event

Webinar: Citrus Leprosis Threat, Mites, and Mite Management

Event Date
Aug 26 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…
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Green alfalfa field with scattered blooms of purple flowers blowing in the wind.
Event

Webinar: Pest Management in Alfalfa, Small Grains, and Garbanzo Beans

Event Date
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,…
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Oval-shaped insect with triangular marking on its back with membranous wings
Event

Webinar: Field Crop Insect and Weed Management Updates

Event Date
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…
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Silverleaf Whitefly (Courtesy of UCR-CISR)
Event

Management of whitefly transmitted viruses in the desert Southwest

Event Date
Jun 10 2025

Do not miss this upcoming meeting hosted by The University of Arizona, Arizona Experiment Station and Emerging Viruses in Cucurbits Working Group (EVCWG) that is focused on the management of insect transmitted viruses in desert melon production. Two of our local UCCE Imperial County advisors, Ana Pastrana …
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Tomato Pests and Diseases
Event

Tomato Pests and Diseases-Laguna Beach

Event Date
Jun 21 2025

The best thing about growing tomatoes – their wonderful flavor. The worst? Pests, diseases and environmental threats.  In this presentation, UC Master Gardeners of Orange County will examine those and provide general control methods, including crop rotation, planting/watering, choosing disease resistant…
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Valley oak tree atop a hill of brown grass.
Event

Webinar: Mediterranean Oak Borer & Other Pests of California Oaks

Event Date
Apr 10 2025

The Mediterranean Oak Borer (MOB) is an invasive ambrosia beetle that infests several species of white oaks in California: valley oak, blue oak, and Oregon oak. The beetle is spreading rapidly in Napa, Lake, Sonoma, and Sacramento Counties and has been detected in neighboring El Dorado, Yolo, and Mendocino…
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Small pink and white waxy insects feeding on young citrus fruit.
Event

UC Ag Experts Talk: Mealybug Management in Citrus Orchards in California

Event Date
May 21 2025

In this webinar, Dr. Sandipa Gautam, Cooperative Extension Area Citrus IPM Advisor with the University of California Agriculture and Natural Resources at the Lindcove Research and Extension Center, will discuss citrus mealybug and how it has become a pest of concern for citrus growers in California in recent…
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Stacks of firewood for sale below a canopy with a sign that says "firewood."
Article

Destructive Pests Hide in Firewood

June 9, 2025
By Lindsey Hack
While bringing firewood from home for your weekend camping trip may seem harmless, many invasive pests can hide in firewood and cause serious harm to California’s forests and urban landscapes. You can help limit the spread of these unwanted hitchhikers by collecting or buying firewood close to where you plan…
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Article

2025 5th Report-- May 22nd

May 22, 2025
By Patricia A Lazicki, Neil McRoberts
General outlook & thrips populationAs planting wraps up, temperatures remain similar to long-term averages. Thrips population predictions are similar to last week’s update. Generation 2 adults peaked a couple weeks ago; generation three adults are predicted to peak 6/8.  The 3rd and 4th…
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Dying brown tree branch
Article

What’s Wrong with My Plant?

April 30, 2025
By Belinda Messenger-Sikes
When you spot a plant in your garden that doesn’t look healthy, how do you figure out what’s wrong with it? Plant problems can be caused by insects, mites, vertebrates, environmental conditions, and diseases, but it can sometimes be hard to tell which is causing the problem. UC IPM's Plant Problem…
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