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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
Zygophyllum fabago Syrian beancaper plant herbaceous limited n/a (already in CA) CDFA
Zygogramma exclamationis sunflower beetle arthropod beetle not present moderate CDFA (reg. A)
Zosterops japonica Japanese White-eye vertebrate bird not present high Cal Code 14:671
Zostera japonica Japanese eelgrass plant herbaceous limited n/a (already in CA) CDFA
Zophodia convolutella gooseberry fruitworm arthropod butterfly, moth not present moderate CDFA (reg. A)
Zonosemata electa pepper maggot arthropod fly not present moderate CDFA (reg. A)
Zeuzera pyrina leopard moth arthropod butterfly, moth not present high CDFA (reg. A)
Zeiraphera canadensis spruce budworm arthropod butterfly, moth not present moderate CDFA (reg. A)
Zantedeschia aethiopica calla lily plant herbaceous limited n/a (already in CA) Cal-IPC list
Zabrotes subfasciatus Mexican bean weevil arthropod beetle limited n/a (already in CA) CDFA (reg. B)
Zabrotes spp. bean weevil arthropod beetle limited n/a (already in CA) CDFA (reg. B)
Yersinia pestis Bubonic Plague disease bacterium widespread n/a (already in CA) NIAID
Xylophilus ampelinus (Xanthomonas ampelina) Grapevine Bacterial Blight disease bacterium not present moderate EPPO
Xylella fastidiosa CVC Citrus/Select Agent (citrus variegated chlorosis strain) disease bacterium not present low APHIS OPIS
Xylella fastidiosa Pierce's Disease/grapevine disease bacterium limited moderate CDFA PD/GWSS
Xyleborus spp. ambrosia beetles arthropod beetle not present moderate USDA Plant/Pest
Xyleborus pfeili ambrosia beetle arthropod beetle limited n/a (already in CA) CDFA (reg. B)
Xyleborus glabratus Redbay ambrosia beetle arthropod beetle not present high CDFA (reg. A)
Xyleborinus andrewesi Asian ambrosia beetle arthropod beetle not present high CDFA (reg. A)
Xenopus laevis African clawed frog vertebrate amphibian limited n/a (already in CA) Cal Code 14:671
Xanthomonas vasculorum Bacterial Blight of Sugarcane 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 oryzae pv. oryzicola Bacterial Leaf Streak of Rice/Select Agent 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 campestris pv vasculorum Sugarcane Gumming Disease disease bacterium VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Xanthomonas axonopodis vasculorum Sugarcane Gumming Disease disease bacterium VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Xanthomonas axonopodis pv. Dieffenbachiae Anthurium Blight disease bacterium VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Xanthomonas axonopodis manihotis Cassava Bacterial Blight disease bacterium VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Xanthomonas anoxopodis pv. citri Citrus Canker disease bacterium not present high USDA Plant/Pest
Xanthomonas albilineans Sugarcane Wilt disease bacterium VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Xanthomonas acernea Cotton small leaf agent disease bacterium VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Watsonia meriana bulbil watsonia plant herbaceous limited n/a (already in CA) Cal-IPC list
Watersipora subtorquata Moss animal invertebrate other limited n/a (already in CA) Exoticsguide
Washingtonia robusta Mexican fan palm plant woody limited n/a (already in CA) Cal-IPC list
Waikavirus rtsv Rice Tungro Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Vulpia myuros rattail fescue plant grass widespread n/a (already in CA) Cal-IPC list
Vulpes vulpes Red Fox vertebrate mammal limited n/a (already in CA) Cal Code 14:671
Viscum album European mistletoe plant herbaceous limited n/a (already in CA) CDFA
Viral Hemorrhagic Septicemia Virus Viral Hemorrhagic Septicemia (VHS) disease virus VALUE REQUIRED VALUE REQUIRED No list
Vinca major big periwinkle plant herbaceous widespread n/a (already in CA) Cal-IPC list
Vicia villosa hairy vetch plant herbaceous widespread n/a (already in CA) Weeds of CA
Vicia sativa garden vetch plant herbaceous widespread n/a (already in CA) Weeds of CA
Vibrio cholerae Cholera disease bacterium limited n/a (already in CA) CIDRAP
Verbena litoralis tall vervain plant herbaceous widespread n/a (already in CA) Cal-IPC list
Verbascum thapsus common mullein plant herbaceous widespread n/a (already in CA) Cal-IPC list
Verbascum blattaria moth mullein plant herbaceous limited n/a (already in CA) CO Weed List
Venerupsis phillipinarus Japanese littleneck clam invertebrate aquatic mollusk, marine limited n/a (already in CA) Exoticsguide
Velataspis dentata dentate scale arthropod scale, aphid not present moderate CDFA (reg. A)
Veinal necrosis virus (PVYN) Veinal necrosis virus (PVYN) disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Varroa jacobsoni varroa mite arthropod mite widespread n/a (already in CA) USDA Plant/Pest
Varanus niloticus Nile monitor vertebrate reptile not present moderate Cal Code 14:671
Vallisneria spp. eelgrass plant herbaceous not present high CDFA
Utricularia inflata swollen bladderwort plant herbaceous not present moderate WA Weed List
Urosalpinx cinerea Atlantic oyster drill invertebrate aquatic mollusk, marine widespread n/a (already in CA) Exoticsguide
Uromycladium tepperianum Rust disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Uromyces transversalis Gladiolus Rust disease fungus limited n/a (already in CA) USDA pest
Uromyces nyikensis Rust disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Uromyces gladioli Rust disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Urocystis tritici Flag Smut Agent disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Urocystis agropyri Flag Smut disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Urochloa panicoides liverseed grass plant grass not present high USDA Plant/Pest
Uredo gladioli-buettneri Graminicolous Rust disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Uredo dioscoreae-alatae Graminicolous Rust disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Uraeginthus benglaus Red-cheeked condon-bleu vertebrate bird VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Unknown pathogenic virus or prion 2 Chronic Wasting Disease (Cervids) disease unknown not present moderate CDFA AHFSS
Unknown pathogenic virus or prion 1 Bovine spongiform encephalopathy (BSE) disease unknown not present low Iowa State Univ
Unknown pathogenic virus or phytoplasma Australian citrus dieback n/a probably phytoplasma disease unknown not present VALUE REQUIRED No list
Unknown pathogenic virus ccdv Citrus chlorotic dwarf virus ccdv 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 8 Grapevine Vein Necrosis 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 6 Grapevine Little Leaf 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 4 Grapevine Bratislava Mosaic Agent 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 2 Euonymus Mosaic Agents disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Unknown pathogenic virus 12 Horsechestnut Yellow Mosaic Agent disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Unknown pathogenic virus 11 Horsechestnut Variegation Agent disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Unknown pathogenic virus 10 Hibiscus Leaf Curl Agent disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Unknown pathogenic virus 1 Australian lymphoidal Parvo-Like Virus of fish disease virus VALUE REQUIRED VALUE REQUIRED No list
Unknown pathogenic phytoplasma 9 Stolbur disease phytoplasma VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Unknown pathogenic phytoplasma 8 Potato witches broom disease phytoplasma VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Unknown pathogenic phytoplasma 7 Potato Purple Top Roll disease phytoplasma VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Unknown pathogenic phytoplasma 6 Potato Marginal Flavescence disease phytoplasma VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Unknown pathogenic phytoplasma 5 Palm Lethal Yellowing Phytoplasma disease phytoplasma VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Unknown pathogenic phytoplasma 4 Groundnut witches broom disease phytoplasma VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Unknown pathogenic phytoplasma 3 Grapevine Vergelbungskrankheit disease phytoplasma VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Unknown pathogenic phytoplasma 2 Cotton virescence disease phytoplasma VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Unknown pathogenic phytoplasma 11 Texas phoenix palm phytoplasma disease phytoplasma not present VALUE REQUIRED No list
Unknown pathogenic phytoplasma 10 Sweetpotato witches broom (little leaf) disease phytoplasma VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Unknown pathogenic phytoplasma 1 Apple Rubbery Wood Phytoplasma disease phytoplasma VALUE REQUIRED VALUE REQUIRED No list
Unknown pathogenic bacterium Wheat Yellowing Stripe Bacterium disease bacterium VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Unknown pathogeic coronavirus- and arterivirus-like virus Yellowhead disease of shrimp disease virus VALUE REQUIRED VALUE REQUIRED No list
Undaria pinnatifida wakame plant algae widespread n/a (already in CA) Cal-IPC list
Unaspis euonymi euonymus scale arthropod scale, aphid limited n/a (already in CA) CDFA (reg. B)
Unaspis citri citrus snow scale arthropod scale, aphid not present moderate CDFA (reg. A)
Umbravirus grv Groundnut Rosette Viruses disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Ulmus pumila Siberian elm plant woody limited n/a (already in CA) Med. plants list
Ulex europaeus gorse plant woody limited n/a (already in CA) CDFA