Invasive Species

The Asian Citrus Psyllid (ACP) is a small, aphid-sized insect that poses a serious threat to California's citrus trees. This invasive pest can carry and transmit a fatal bacterial disease called Huanglongbing (HLB) to all citrus species.

The 10th annual California Invasive Species Action Week (CISAW) will kick off Saturday June 3rd and runs to Sunday June 11th. This week is designed to raise awareness and encourage public participation in the ongoing fight against invasive species.

The invasive pest spotlight focuses on emerging or potential invasive pests in California. In this issue we are covering the emerald ash borer.

The jumping worm, Amynthas agrestis, is an invasive earthworm capable of harming native forests that has been recently reported in some areas of California.

Mosquito Awareness Week, observed April 16 - 22, 2023, educates California residents about mosquitoes and how to help prevent the spread of mosquito-transmitted diseases.

Invasive pest species threaten California's natural environment and can have an impact on public health. Help spread the word about these invasive species and how to limit their introduction, spread, and harm. Learn to recognize these pests and distinguish them from look-alikes.

The invasive pest spotlight focuses on emerging or potential invasive pests in California. In this issue, we cover the brown widow spider.

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.

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.

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.