Pests

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Crape Myrtle leaves with sooty mold
Over the Fence (Alameda County): 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.

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.
Pests in the Urban Landscape: 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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Seedlings, sunflower, and pomegranates represent spring, summer, and fall in the garden/
UC Master Gardeners of Butte County: Page

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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Seedlings, sunflower, and pomegranates represent spring, summer, and fall in the garden/
UC Master Gardeners of Butte County: Page

Garden Guide Extras

The Guide is full of information to help you on your gardening journey. Besides a wide range of articles, the weekly journal layout includes information pertinent for that week. The appendix is a helpful reference on planting, insects, and orchards. Get tips on how to customize and to use it.
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UC Cooperative Extension Sonoma County: Page

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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