Invasive Species

From February 24 - 28, 2025, help increase public awareness of invasive species and join the fight against invasive species by participating in National Invasive Species Action Week (NISAW).

Recent rainfall throughout much of California has created puddles and stagnant water. With the temperature warming up in many parts of the state, this combination can create the perfect situation for mosquitoes to breed. We encourage you to drain after the rain to reduce mosquito-breeding sites.

The spotted lanternfly (SLF) is an invasive insect pest first detected in Pennsylvania in 2014, with confirmed sightings and/or infestations of SLF now reported in 20 eastern states.

Protect citrus trees from the invasive Asian Citrus Psyllid. Learn how you can help prevent the spread of this harmful pest.

On March 27th, 2024, a flatbed truck carrying a metal art structure originating in New York and headed to Petaluma, California was stopped at the California Department of Food and Agriculture (CDFA) Agricultural Inspection Station in Truckee, California due to live spotted lanternfly (SLF) egg masse...

The invasive pest spotlight focuses on emerging or potential invasive pests in California. In this issue we are covering the Mediterranean fruit fly. Mediterranean Fruit Fly Facts The Mediterranean fruit fly, Ceratitis capitata, commonly called Medfly, attacks more than 260 different plant species.

Learn how to identify and manage the invasive Tree of Heaven with guidance from UC Master Gardeners of Alameda County. Protect your landscape today!

Exotic and invasive pests threaten California's natural environments, agricultural production, structures, landscapes and gardens. Exotic pests are organisms introduced into an area beyond their natural range and become pests in the new environment.

What you do with firewood this upcoming 4th of July (and year-round!) can impact more than just the s'mores on your campfire. If you move firewood around the state, you could spread deadly plant diseases and invasive insects. Don't take firewood with you if you travel or camp this holiday weekend.

Pampasgrass (Cortaderia selloana) is a common ornamental landscape plant that readily naturalizes throughout California's coastal areas and some interior regions.