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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 Name Common Namesort icon Type Subtype Extent Risk of Introduction First Source
Aethina tumida small hive beetle arthropod beetle limited n/a (already in CA) CDFA (reg. B)
Herpestes auropunctatus Small Indian mongoose vertebrate mammal VALUE REQUIRED VALUE REQUIRED Lacey Act
Atrichonotus taeniatulus small lucerne weevil arthropod beetle not present high CDFA (reg. B)
Conotrachelus perseae small seed weevil arthropod beetle not present high CDFA (reg. A)
Tamarix parviflora smallflower tamarisk plant woody widespread n/a (already in CA) Cal-IPC list
Piptatherum miliaceum smilograss plant grass widespread n/a (already in CA) Cal-IPC list
Hypochaeris glabra smooth catsear plant herbaceous widespread n/a (already in CA) CO Weed List
Spartina alterniflora smooth cordgrass and hybrids plant grass limited n/a (already in CA) Cal-IPC list
Spartina alterniflora x foliosa hybrids smooth cordgrass and hybrids plant grass limited n/a (already in CA) Cal-IPC list
Carthamus baeticus smooth distaff thistle plant herbaceous limited n/a (already in CA) CDFA
Hieracium laevigatum smooth hawkweed plant herbaceous not present low WA Weed List
Cuscuta approximata smoothseed alfalfa dodder plant herbaceous limited n/a (already in CA) WA Weed List
Chelydra serpentine Snapping turtle vertebrate reptile not present moderate Cal Code 14:671
Bromus hordeaceus soft brome plant grass widespread n/a (already in CA) Cal-IPC list
Mya arenaria Soft-shell clam invertebrate aquatic mollusk, marine limited n/a (already in CA) Exoticsguide
Bactrocera latifrons solanaceous fruit fly arthropod fly not present moderate CDFA (reg. A)
Sorghum propinquum sorghum plant grass not present low NV Weed List
Claviceps spp. Sorghum Ergot disease fungus limited VALUE REQUIRED APHIS OPIS
Celama sorghiella sorghum webworm arthropod butterfly, moth not present moderate CDFA (reg. A)
Senecio inaequidens South African ragwort plant woody not present low USDA Plant/Pest
Anastrepha grandis South American cucurbit fruit fly arthropod fly not present high USDA Plant/Pest
Anastrepha fraterculus South American fruit fly arthropod fly not present high CDFA (reg. A)
Naupactus xanthographus South American fruit tree weevil arthropod beetle not present moderate USDA Plant/Pest
Microcyclus ulei South American Leaf Blight disease fungus not present low APSNet
Spodoptera eridania southern armyworm arthropod butterfly, moth not present high CDFA (reg. A)
Diatraea crambidoides southern corn stalk borer arthropod butterfly, moth not present moderate CDFA (reg. A)
Salvia virgata southern meadow sage plant herbaceous not present moderate CDFA
Scapteriscus borellii southern mole cricket arthropod grasshopper, cricket limited n/a (already in CA) CDFA (reg. B)
Cenchrus echinatus southern sandbur plant grass widespread n/a (already in CA) CDFA
Nerodia fasciata Southern Watersnake vertebrate reptile limited high Cal Code 14:671
Diatraea grandiosella southwestern corn borer arthropod butterfly, moth not present moderate CDFA (reg. A)
Melittia calabaza southwestern squash vine borer arthropod butterfly, moth not present moderate CDFA (reg. A)
Aphis glycines soybean aphid arthropod scale, aphid not present high USDA pest
Luteovirus sbdv Soybean dwarf virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Soybean Dwarf Virus Soybean Dwarf Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Phakopsora meibomiae soybean rust disease fungus not present high APHIS OPIS
Spartium junceum Spanish broom plant woody widespread n/a (already in CA) Cal-IPC list
Caiman crocodilus Spectacled caiman vertebrate reptile not present high Cal Code 14:671
Salsola collina spineless Russian thistle plant herbaceous not present high CDFA
Trionyx spiniferus Spiny softshell vertebrate reptile VALUE REQUIRED n/a (already in CA) DFG Code 2118
Limnobium laevigatum spongeplant plant herbaceous limited n/a (already in CA) CDFA
Icterus pectoralis Spot-breasted oriole vertebrate bird VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Earias fabia spotted bollworm arthropod butterfly, moth not present moderate USDA Plant/Pest
Diabrotica undecimpunctata howardi spotted cucumber beetle arthropod beetle not present high CDFA (reg. A)
Streptopelia chinensis Spotted dove vertebrate bird VALUE REQUIRED n/a (already in CA) FL FWCC NNS List
Centaurea stoebe ssp. micranthos spotted knapweed plant herbaceous limited n/a (already in CA) AZ Weed List
Drosophila suzukii Spotted Wing Drosophila arthropod fly widespread n/a (already in CA) CDFA Detect. Adv
Choristoneura fumiferana spruce budworm arthropod butterfly, moth not present moderate CDFA (reg. A)
Zeiraphera canadensis spruce budworm arthropod butterfly, moth not present moderate CDFA (reg. A)
Chrysomyxa abietis Spruce Needle Rust disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Chrysomyxa himalensis Spruce Needle Rust disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Thymelaea passerina spurge flax plant herbaceous not present moderate WA Weed List
Anoda cristata spurred anoda plant herbaceous limited n/a (already in CA) CO Weed List
Cathartus quadricollis squarenecked grain beetle arthropod beetle not present high CDFA (reg. A)
Centaurea virgata ssp. Squarrosa squarrose knapweed plant herbaceous limited n/a (already in CA) Cal-IPC list
Epilachna borealis squash beetle arthropod beetle not present high CDFA (reg. A)
Melittia cucurbitae squash vine borer arthropod butterfly, moth not present moderate CDFA (reg. A)
Saimiri sciureus Squirrel monkey vertebrate mammal VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Myllocerus undecimpustulatus undatus Sri Lanka weevil arthropod beetle not present moderate CDFA (reg. A)
Papaipema nebris stalk borer arthropod butterfly, moth not present moderate CDFA (reg. A)
Botryllus schlosseri Star sea squirt invertebrate crustaceans and tunicates limited n/a (already in CA) Exoticsguide
Phellinus senex Stem decay disease fungus VALUE REQUIRED VALUE REQUIRED USDA Plant/Pest
Antaeotricha leucillana stenomine oecophorid arthropod butterfly, moth not present moderate CDFA (reg. A)
Rhacodiella vitis Sterenberg fungus disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Arctotheca calendula (sterile) sterile capeweed plant herbaceous limited n/a (already in CA) CDFA
Dittrichia graveolens stinkwort plant herbaceous widespread n/a (already in CA) Cal-IPC list
Mustela erminea Stoat vertebrate mammal VALUE REQUIRED VALUE REQUIRED Lacey Act
Unknown pathogenic phytoplasma 9 Stolbur disease phytoplasma VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Anthonomus signatus strawberry bud weevil arthropod beetle not present high CDFA (reg. A)
Nepovirus slrsv Strawberry Latent Ringspot Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Balanus amphitrite Striped barnacle invertebrate crustaceans and tunicates limited n/a (already in CA) Exoticsguide
Acalymma vittatum striped cucumber beetle arthropod beetle not present high CDFA (reg. A)
Bactrocera scutellata Striped fruit fly arthropod fly not present low CDFA (reg. A)
Ferrisia virgata striped mealybug arthropod scale, aphid limited n/a (already in CA) CDFA (reg. B)
Phytophthora ramorum Sudden oak death disease oomycete limited n/a (already in CA) APHIS OPIS
Diatraea saccharalis sugarcane borer arthropod butterfly, moth not present moderate CDFA (reg. A)
Peronosclerospora sacchari (philippinensis) Sugarcane Downy Mildew disease fungus not present low USDA Plant/Pest
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
Phytoplasma scwl Sugarcane White Leaf Phytoplasma disease phytoplasma VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Neomaskellia bergii sugarcane whitefly arthropod scale, aphid not present high USDA Plant/Pest
Xanthomonas albilineans Sugarcane Wilt disease bacterium VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Potentilla recta sulfur cinquefoil plant herbaceous limited n/a (already in CA) CDFA
Cacatua galerita Sulphur-crested cockatoo vertebrate bird VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Adoxophyes orana summer Fruit Tortrix Moth arthropod butterfly, moth not present high USDA Plant/Pest
Zygogramma exclamationis sunflower beetle arthropod beetle not present moderate CDFA (reg. A)
Scrobipalpa ocellatella surgarbeet crown borer arthropod butterfly, moth not present low CDFA (reg. A)
Cervus duvauceli Swamp deer vertebrate mammal VALUE REQUIRED VALUE REQUIRED Witmer et al
Ipomoea aquatica swamp morningglory plant herbaceous limited n/a (already in CA) USDA Plant/Pest
Lobularia maritima sweet alyssum plant herbaceous limited n/a (already in CA) Cal-IPC list
Diaspidiotus liquidambaris sweet gum scale arthropod scale, aphid limited n/a (already in CA) CDFA (reg. B)
Elsinoe australis Sweet Orange Scab disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Pseudocercospora timorensis Sweet Potato leaf spot disease fungus VALUE REQUIRED VALUE REQUIRED USDA Plant/Pest
Elsinoe batatas sweet potato scab disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Anthoxanthum odoratum sweet vernalgrass plant grass widespread n/a (already in CA) Cal-IPC list
Crinivirus spcsv Sweetpotato Chlorotic Stunt Virus disease virus VALUE REQUIRED VALUE REQUIRED No list
Sweetpotato chlorotic stunt virus Sweetpotato chlorotic stunt virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Typophorus nigritus viridicyaneus sweetpotato leaf beetle arthropod beetle not present moderate CDFA (reg. A)
Omphisa anastomosalis sweetpotato vine borer arthropod beetle not present moderate USDA Plant/Pest
Cylas formicarius elegantulus sweetpotato weevil arthropod beetle not present high CDFA (reg. A)