Pests

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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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Crape Myrtle leaves with sooty mold
Article

What is that Black Stuff on my Plant Leaves?

June 14, 2025
By Judy Quan
The black stuff on your leaves is likely sooty moldThe black stuff on your leaves is probably sooty mold, a fungal disease growing on plants and other surfaces, and it is often seen in the spring and summer. The leaves or stems have a black coating that looks like soot. If you look closely, it is growing…
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A shiny green and bronze beetle on a heavily damaged leaf.
Article

Wrapping Up Invasive Species Action Week

June 12, 2025
By Cherie Shook, Lindsey Hack
This week, we shared information about important invasive species, what to do if you find them, and how you can help prevent their spread. To wrap up California Invasive Species Action Week, we’d like to highlight a few key takeaways: Don’t pack or plant a pest Whether you’re traveling or gardening…
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Red, black, and white spotted lanternfly nymphs on a plant.
Article

Be on the Lookout

June 8, 2025
By Cherie Shook
Be on the lookout for invasive species threatening California! While state and federal agencies actively monitor for new invasive pests, the public serves a critical role in early detection and often are the ones who find new invasive species first.  During California Invasive Species Action Week …
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Threecornered alfalfa hopper degree day model

The threecornered alfalfa hopper (TCAH) is a vector of Grapevine red blotch virus that causes Grapevine red blotch disease in vineyards. A degree day model was developed to predict the ideal time frame for ground cover management to help reduce TCAH populations in vineyards.
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Seedlings, sunflower, and pomegranates represent spring, summer, and fall in the garden/
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Garden Guide & Three-Year Journal

The Butte County Garden Guide and Three-Year Journal is compiled and edited by the UC-trained Master Gardeners of Butte County. This county-specific book contains tips for every home gardener.
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