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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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Tall, green stalks of giant reed towering over two humans standing in front.
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Keep Invasive Plants Out!

June 11, 2025
By Lindsey Hack
The golden flowers of French broom covering hillsides and the tall, striking stalks of pampasgrass stand out on trails and roadsides. These plants may be beautiful, but they are invasive and harm California’s natural landscapes.  Invasive plants outcompete and crowd out native plants, damaging…
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Stacks of firewood for sale below a canopy with a sign that says "firewood."
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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.
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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.
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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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Cross section of a tree trunk that has trellis-like tunnels throughout. The tunnels are dark stained and go deep into the wood.
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Mediterranean Oak Borer: Questions & Answers

May 28, 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 Northern California counties and there is considerable potential for the beetle's range to expand as they…
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