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CISAC has compiled the list below of over 1,700 species known to be invasive in California or a potential threat for introduction to the state. Please use the comment form below to let us know about: taxa that should be added or removed; species information that you would change; and species that you think should be a high priority for having a scorecard completed (choose Review Scorecards to see the list of scorecards already drafted). Make sure to click Save. Previous comments are displayed at the bottom of the page.

Download Species List (.csv) (to open in a Spreadsheet program)
This data download is provided to aid in the review of the draft invasive species list. We discourage other use of this data until it has been revised and finalized.

Scientific Namesort icon Common Name Type Subtype Extent Risk of Introduction First Source
Unknown pathogenic virus 12 Horsechestnut Yellow Mosaic Agent disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Unknown pathogenic virus 2 Euonymus Mosaic Agents disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Unknown pathogenic virus 3 French Bean Mosaic Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Unknown pathogenic virus 4 Grapevine Bratislava Mosaic Agent disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Unknown pathogenic virus 5 Grapevine Chasselas Latent Agent disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Unknown pathogenic virus 6 Grapevine Little Leaf Agent disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Unknown pathogenic virus 7 Grapevine Vein Mosaic Agent disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Unknown pathogenic virus 8 Grapevine Vein Necrosis Agent disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Unknown pathogenic virus 9 Grapevine vein yellow agent disease virus VALUE REQUIRED VALUE REQUIRED USDA Plant/Pest
Unknown pathogenic virus ccdv Citrus chlorotic dwarf virus ccdv disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Unknown pathogenic virus or phytoplasma Australian citrus dieback n/a probably phytoplasma disease unknown not present VALUE REQUIRED No list
Unknown pathogenic virus or prion 1 Bovine spongiform encephalopathy (BSE) disease unknown not present low Iowa State Univ
Unknown pathogenic virus or prion 2 Chronic Wasting Disease (Cervids) disease unknown not present moderate CDFA AHFSS
Uraeginthus benglaus Red-cheeked condon-bleu vertebrate bird VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Uredo dioscoreae-alatae Graminicolous Rust disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Uredo gladioli-buettneri Graminicolous Rust disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Urochloa panicoides liverseed grass plant grass not present high USDA Plant/Pest
Urocystis agropyri Flag Smut disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Urocystis tritici Flag Smut Agent disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Uromyces gladioli Rust disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Uromyces nyikensis Rust disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Uromyces transversalis Gladiolus Rust disease fungus limited n/a (already in CA) USDA pest
Uromycladium tepperianum Rust disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Urosalpinx cinerea Atlantic oyster drill invertebrate aquatic mollusk, marine widespread n/a (already in CA) Exoticsguide
Utricularia inflata swollen bladderwort plant herbaceous not present moderate WA Weed List
Vallisneria spp. eelgrass plant herbaceous not present high CDFA
Varanus niloticus Nile monitor vertebrate reptile not present moderate Cal Code 14:671
Varroa jacobsoni varroa mite arthropod mite widespread n/a (already in CA) USDA Plant/Pest
Veinal necrosis virus (PVYN) Veinal necrosis virus (PVYN) disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Velataspis dentata dentate scale arthropod scale, aphid not present moderate CDFA (reg. A)
Venerupsis phillipinarus Japanese littleneck clam invertebrate aquatic mollusk, marine limited n/a (already in CA) Exoticsguide
Verbascum blattaria moth mullein plant herbaceous limited n/a (already in CA) CO Weed List
Verbascum thapsus common mullein plant herbaceous widespread n/a (already in CA) Cal-IPC list
Verbena litoralis tall vervain plant herbaceous widespread n/a (already in CA) Cal-IPC list
Vibrio cholerae Cholera disease bacterium limited n/a (already in CA) CIDRAP
Vicia sativa garden vetch plant herbaceous widespread n/a (already in CA) Weeds of CA
Vicia villosa hairy vetch plant herbaceous widespread n/a (already in CA) Weeds of CA
Vinca major big periwinkle plant herbaceous widespread n/a (already in CA) Cal-IPC list
Viral Hemorrhagic Septicemia Virus Viral Hemorrhagic Septicemia (VHS) disease virus VALUE REQUIRED VALUE REQUIRED No list
Viscum album European mistletoe plant herbaceous limited n/a (already in CA) CDFA
Vulpes vulpes Red Fox vertebrate mammal limited n/a (already in CA) Cal Code 14:671
Vulpia myuros rattail fescue plant grass widespread n/a (already in CA) Cal-IPC list
Waikavirus rtsv Rice Tungro Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Washingtonia robusta Mexican fan palm plant woody limited n/a (already in CA) Cal-IPC list
Watersipora subtorquata Moss animal invertebrate other limited n/a (already in CA) Exoticsguide
Watsonia meriana bulbil watsonia plant herbaceous limited n/a (already in CA) Cal-IPC list
Xanthomonas acernea Cotton small leaf agent disease bacterium VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Xanthomonas albilineans Sugarcane Wilt disease bacterium VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Xanthomonas anoxopodis pv. citri Citrus Canker disease bacterium not present high USDA Plant/Pest
Xanthomonas axonopodis manihotis Cassava Bacterial Blight disease bacterium VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Xanthomonas axonopodis pv. Dieffenbachiae Anthurium Blight disease bacterium VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Xanthomonas axonopodis vasculorum Sugarcane Gumming Disease disease bacterium VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Xanthomonas campestris pv vasculorum Sugarcane Gumming Disease disease bacterium VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Xanthomonas oryzae pv. oryzae Bacterial Leaf Blight of Rice/Select agent disease bacterium VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Xanthomonas oryzae pv. oryzicola Bacterial Leaf Streak of Rice/Select Agent disease bacterium VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Xanthomonas populi Grapevine Infectious Necrosis Bacterium disease bacterium VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Xanthomonas populi Poplar Canker disease bacterium VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Xanthomonas vasculorum Bacterial Blight of Sugarcane disease bacterium VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Xenopus laevis African clawed frog vertebrate amphibian limited n/a (already in CA) Cal Code 14:671
Xyleborinus andrewesi Asian ambrosia beetle arthropod beetle not present high CDFA (reg. A)
Xyleborus glabratus Redbay ambrosia beetle arthropod beetle not present high CDFA (reg. A)
Xyleborus pfeili ambrosia beetle arthropod beetle limited n/a (already in CA) CDFA (reg. B)
Xyleborus spp. ambrosia beetles arthropod beetle not present moderate USDA Plant/Pest
Xylella fastidiosa Pierce's Disease/grapevine disease bacterium limited moderate CDFA PD/GWSS
Xylella fastidiosa CVC Citrus/Select Agent (citrus variegated chlorosis strain) disease bacterium not present low APHIS OPIS
Xylophilus ampelinus (Xanthomonas ampelina) Grapevine Bacterial Blight disease bacterium not present moderate EPPO
Yersinia pestis Bubonic Plague disease bacterium widespread n/a (already in CA) NIAID
Zabrotes spp. bean weevil arthropod beetle limited n/a (already in CA) CDFA (reg. B)
Zabrotes subfasciatus Mexican bean weevil arthropod beetle limited n/a (already in CA) CDFA (reg. B)
Zantedeschia aethiopica calla lily plant herbaceous limited n/a (already in CA) Cal-IPC list
Zeiraphera canadensis spruce budworm arthropod butterfly, moth not present moderate CDFA (reg. A)
Zeuzera pyrina leopard moth arthropod butterfly, moth not present high CDFA (reg. A)
Zonosemata electa pepper maggot arthropod fly not present moderate CDFA (reg. A)
Zophodia convolutella gooseberry fruitworm arthropod butterfly, moth not present moderate CDFA (reg. A)
Zostera japonica Japanese eelgrass plant herbaceous limited n/a (already in CA) CDFA
Zosterops japonica Japanese White-eye vertebrate bird not present high Cal Code 14:671
Zygogramma exclamationis sunflower beetle arthropod beetle not present moderate CDFA (reg. A)
Zygophyllum fabago Syrian beancaper plant herbaceous limited n/a (already in CA) CDFA