California | National Invasive Species Information Center

Spotlights

APHIS Adds Del Norte County in California to Phytophthora ramorum Quarantine Area (May 21, 2021)

USDA. Animal and Plant Health Inspection Service.

Effective immediately, the Animal and Plant Health Inspection Service (APHIS) is expanding the Phytophthora ramorum (P. ramorum) quarantine area in Del Norte County, California. APHIS is taking this action in response to the confirmation of P. ramorum in the county on September 19, 2020. The California Department of Food and Agriculture has established an intrastate quarantine for the areas in Del Norte County that mirrors the federal regulatory requirements as specified in 7 CFR 301.92.

P. ramorum is the pathogen that causes sudden oak death, ramorum leaf blight, or ramorum dieback. Sudden oak death was first reported in 1995 on tan oak in Mill Valley, Marin County, California. Through ongoing surveys, APHIS continues to define the extent of the pathogen's distribution in the United States and uses quarantine areas and public outreach to limit its artificial spread beyond infected areas. Details on APHIS-designated P. ramorum quarantine and regulated areas and the conditions to move regulated articles are in 7 CFR 301.92 and at the APHIS website.

Invasive Seaweed Found in Newport Bay (Apr 22, 2021)

California Department of Fish and Wildlife.

Multiple federal, state and local agencies have been notified of an invasive algae species discovered in Newport Bay, California. The algae, which is native to Florida and other subtropical and tropical locales, is scientifically known as Caulerpa prolifera. It can grow quickly, choking out native seaweeds and potentially harming marine life through lost habitat.

A similar species of invasive algae, Caulerpa taxifolia, was identified in California in 2000 and was successfully eradicated through a comprehensive joint local, state and federal effort in 2006. Due to the similarity between these two species, scientists believe this algae species may pose a serious threat to our local coastal ecosystems.

However, it is imperative that the public avoid contact with the plant due to its extreme ease of recolonizing from just tiny fragments. If you believe you have seen this invasive algae, please complete a Suspect Invasive Species Sighting Report: Invasive Algae - Caulerpa prolifera. Please do not collect a specimen, as this may lead to further spread.

USDA Announces Transition to Preventive Plan for Virulent Newcastle Disease in California (Jun 1, 2020)

USDA. Animal and Plant Health Inspection Service.

The United States Department of Agriculture's (USDA) Animal and Plant Health Inspection Service (APHIS) is announcing that effective today, we are transitioning our virulent Newcastle disease (vND) efforts in southern California from a response focus to implementing a prevention plan aimed at keeping vND from recurring in the region. Even with extensive testing taking place, APHIS has not confirmed any new vND cases since February 1, 2020. As a result, the California Department of Food and Agriculture (CDFA) is removing its vND quarantine.

Discovery of Invasive Nutria in California

California Department of Fish and Wildlife.

Landowners, we need your help: CDFW has deployed nutria survey teams from the Delta through the San Joaquin Valley and needs written access permissions to enter or cross private properties for the purposes of conducting nutria surveys and, where detected, implementing trapping efforts. Landowners and tenants, we need your help (PDF | 598 KB); so CDFW can survey for and remove destructive nutria from your properties, complete and submit the Nutria Project Temporary Entry Permit (PDF | 207 KB).

What You Can Do: How to Protect Your Citrus Trees

California Department of Food and Agriculture. Citrus Pest and Disease Prevention Program.

The Asian citrus psyllid and citrus greening (Huanglongbing) could be a death sentence for California citrus trees - but with support from California residents, we can save the citrus trees that we all know and love.

State Specific Threats

Early Detection & Distribution Mapping System (EDDMapS) - Invasive Species Status Report by State

University of Georgia. Center for Invasive Species and Ecosystem Health.

Includes invasive species by category for insects, diseases, plants, and animals.
See also: Invasive Species Status Report by Congressional District

Nonindigenous Aquatic Species (NAS) Database - Species Lists By State

DOI. USGS. Wetland and Aquatic Research Center.

Provides fact sheets, maps and collection information for aquatic vertebrates and invertebrates occurring outside of their native range.

Pest Tracker - Exotic Pest Detection By State

USDA. APHIS. Cooperative Agricultural Pest Survey (CAPS). National Agricultural Pest Information System (NAPIS).

Provides State pest detection contacts, recent state exotic pest news, links to state pest resources, and a list of state CAPS survey targets.

Selected Resources

The section below contains highly relevant resources for this subject, organized by source. Or, to display all related content view all resources for California

Council or Task Force

California Invasive Plant Council

California Invasive Plant Council.

California Oak Mortality Task Force (Sudden Oak Death)

California Oak Mortality Task Force.

See also: COMTF Newsletter

CalWeedMapper

California Invasive Plant Council.

CalWeedMapper is a new Web site for mapping invasive plant spread and planning regional management. Users generate a report for their region that synthesizes information into three types of strategic opportunities: surveillance, eradication and containment. Land managers can use these reports to prioritize their invasive plant management, to coordinate at the landscape level (county or larger) and to justify funding requests. For some species, CalWeedMapper also provides maps of suitable range that show where a plant might be able to grow in the future. The system was developed by the California Invasive Plant Council and is designed to stay current by allowing users to edit data.

Invasive Species Council of California (ISCC)

Invasive Species Council of California.

Partnership

Lake Tahoe Basin Weed Management Area

Lake Tahoe Basin Weed Management Area.

PlantRight

Plant California Alliance.

Tahoe Boat Inspections

Tahoe Resource Conservation District; Tahoe Regional Planning Agency; DOI. Fish and Wildlife Service.

Watercraft are the largest vectors for spreading aquatic invasive species (AIS), such as quagga and zebra mussels into new waterways, making boat inspections a vital aspect of protecting Lake Tahoe and other nearby water bodies.

Federal Government

BLM California Weeds and Invasives Program

DOI. Bureau of Land Management.

Aquatic Invasive Species

USDA. FS. Lake Tahoe Basin Management Unit.

Forest & Grassland Health - Invasive Species

USDA. FS. Pacific Southwest Region.

San Francisco Bay Area Network - Invasive Plants Early Detection

DOI. NPS. Inventory & Monitoring Program.

Sequoia and Kings Canyon National Parks - Invasive Non-Native Plants

DOI. National Park Service.

Yosemite National Park - Invasive Species

DOI. National Park Service.

State and Local Government

Aquatic Invasive Species Programs

California Department of Parks and Recreation. Division of Boating and Waterways.

Citrus Pest and Disease Prevention Program

California Department of Food and Agriculture. Citrus Pest and Disease Prevention Program.

Exotic Pest Projects - Environmental Monitoring

California Environmental Protection Agency. Pesticide Regulation.

Invasive Species Program

California Department of Fish and Wildlife.

Invasive Weeds in Los Angeles County

County of Los Angeles. Agricultural Commissioner / Weights & Measures.

Lake County Invasive Mussel Prevention Program

Lake County (California).

Marine Invasive Species Program

California State Lands Commission.

Marine Invasive Species Program

California Department of Fish and Wildlife. Office of Spill Prevention and Response.

Pest Profile - Africanized Honeybee

California Department of Food and Agriculture. Plant Health Division. Pest Detection/Emergency Projects Branch.

Pests - Africanized Honey Bee

San Mateo County Department of Agriculture/Weights and Measures (California).

Plant Health and Pest Prevention Services

California Department of Food and Agriculture.

Quagga and Zebra Mussels

California Department of Parks and Recreation. Division of Boating and Waterways.

California registered vessels using fresh water bodies within the state are required to display a “Mussel Fee Paid” sticker on the hull next to the current registration sticker. Paying the Mussel Fee does not entitle vessels to bypass inspections or fees for inspections conducted by individual reservoir owners or managers.

Ready for Wildfire - Forest Health

California Department of Forestry and Fire Protection.

Academic

Bee Alert: Africanized Honey Bee Facts (2002)

University of California. Agriculture and Natural Resources.

ANR Publication 8068

Africanized Honey Bee, Apis mellifera

University of California - Riverside. Center for Invasive Species Research.

California Aquatic Invasive Species

University of California. Agriculture and Natural Resources.

California Statewide Integrated Pest Management Program

University of California. Agriculture and Natural Resources.

The University of California Statewide IPM Program (UC IPM) helps residents, growers, land managers, community leaders, and other professional pest managers prevent and solve pest problems with the least unintended impacts on people and their surroundings.

Center for Invasive Species Research

University of California - Riverside.

Citrus Entomology

University of California. Agricultural and Natural Resources. Kearney Agricultural Center.

Invasive Weed Management Program

University of California. Cooperative Extension. Central Sierra.

Riparian Invasive Research Laboratory (RIVRLAB)

University of California, Santa Barbara. Marine Sciences Institute.

Weed Research and Information Center

University of California. Cooperative Extension and Agricultural Experiment Station.

Professional

Aquatic Invasive Species Program

Tahoe Resource Conservation District.

Practical Guidebook in the Control of Invasive Aquatic and Wetland Plants of the San Francisco Bay-Delta Region

San Francisco Estuary Institute.

Programs - Invasive Species

Tahoe Regional Planning Agency.