Invasive Species Management

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Yellow flowering shrub in a field.
Event

Webinar: Managing Invasive Plants

Event Date
Aug 21 2025

In California, invasive plants cause problems such as increasing wildfire risk, damaging ecosystems, and affecting recreation activities. Join us to learn about the impacts of invasive plants and ways you can help prevent the spread of invasive plants.About the Urban and Community IPM Webinar …
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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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Event

Central Sierra: Controlling Weeds (EDC MG)

Event Date
May 24 2025

Join the El Dorado County Master Gardeners to learn about weeds commonly found in the home landscape, their culture, and control strategies. Well also discuss highly aggressive non-native weeds which have been introduced into El Dorado County.
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Tumbleweeds piled up against the front of a home.
Article

Tumbleweeds Invading?

June 23, 2025
By Belinda Messenger-Sikes
Tumbleweeds rolling across the landscape may make you think of classic old Western movies, but tumbleweeds, or Russian thistle, is more common today than you might think. This invasive plant can grow anywhere the soil is disturbed and once it matures, it breaks off its stem and the dried plant blows across…
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A shiny green and bronze beetle on a heavily damaged leaf.
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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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A staff person from the California Department of Fish and Wildlife inspects a boat.
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Clean, Drain, Dry: Protect Our Waters

June 10, 2025
By Cherie Shook
You may not see them, but small hitchhikers can cling to your boats, trailers, fishing gear, kayaks, and paddleboards. These hitchhikers are aquatic invasive species like plants, fish, and mussels. Once introduced to a body of water, they can displace native species, clog motors, damage water delivery…
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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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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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The letters "CISAW" animated as invasive species organisms.
Article

Protect California from Invasive Species

June 5, 2025
Invasive species. What does that mean? Invasive species are non-native pests that harm California’s natural areas, public health, and economy. To raise awareness about these pests, UC IPM joins other state agencies to promote the annual California Invasive Species Action Week (CISAW), which goes from June 7…
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