Invasive Species

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Features of brown marmorated stink bugs. [Credit: Steve Jacobs, PSU]
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Invasive Pest Spotlight: Brown Marmorated Stink Bug

September 26, 2022
By Karey Windbiel-Rojas
The invasive pest spotlight focuses on emerging or potential invasive pests in California. In this issue we are covering the brown marmorated stink bug (BMSB). Brown marmorated stink bug facts BMSB can cause severe crop and garden losses and become a nuisance in and around homes and other buildings.
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Fig 1 Adult female of Polyhagous shot hole borer
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Invasive Shothole Borers Threaten California’s Urban Forests

July 15, 2022
By Karey Windbiel-Rojas, Beatriz E Nobua Behrmann
When tiny tree-killing beetles first arrived in Southern California several years ago and began destroying urban and riparian forests, they raised widespread concerns among both tree experts and affected communities.
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Pampasgrass infestation in a coastal area.
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Invasive Pest Spotlight: Pampasgrass & Jubatagrass

July 8, 2022
By Belinda Messenger-Sikes, Karey Windbiel-Rojas
Pampasgrass and jubatagrass facts Pampasgrass (Cortaderia selloana) is a common ornamental landscape plant that readily naturalizes throughout California's coastal areas and some interior regions.
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Spotted Lanternfly adult
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New Year, New Pests

January 10, 2022
Every year, invasive pests cause billions of dollars of damage to California agricultural systems and natural areas. These pests can be weeds, plant pathogens, insects, vertebrates, shellfish and other aquatic species.
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A black fig fly laying eggs inside a green fig.
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Black Fig Fly: A New Invasive Pest

December 1, 2021
The black fig fly is a new invasive species recently found in Southern California. It has been found in fig orchards in Los Angeles, Orange, Riverside, Santa Barbara, San Bernardino, San Diego, and Ventura counties. This small insect attacks only figs and prefers unripe or unpollinated fruit.
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Three white and orange insects with waxy strands covering a leaf.
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Giant Whitefly: A Tiny Pest

June 17, 2021
By Belinda Messenger-Sikes
The giant whitefly is not a gargantuan monster out of an old sci-fi movie, although it is quite a bit larger compared to other whiteflies. Whiteflies are typically tiny insects that are hard to spot on plants unless they are flying, but the giant whitefly is more obvious.
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Adult insect with pinkish wings that have black patterning and dots resting on bark.
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Invasive Species Action Week 2021

June 6, 2021
California Invasive Species Action Week began Saturday, June 5 and runs through Sunday, June 13, 2021. Increasing public awareness of invasive species and their impacts helps protect our natural resources, waterways, native species, agriculture, and health.
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