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 Name |
Type | Subtype | Extent | Risk of Introduction | First Source | |
|---|---|---|---|---|---|---|---|
| Unknown pathogenic phytoplasma 10 | Sweetpotato witches broom (little leaf) | disease | phytoplasma | VALUE REQUIRED | VALUE REQUIRED | APHIS OPIS | |
| Porcine herpesvirus 1 | Swine pseudorabies | disease | virus | not present | VALUE REQUIRED | Chavarria NRDC | |
| Enterovirus cv-b5 | Swine Vesicular Disease | disease | virus | VALUE REQUIRED | VALUE REQUIRED | No list | |
| Coronopus squamatus | swinecress | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Utricularia inflata | swollen bladderwort | plant | herbaceous | not present | moderate | WA Weed List | |
| Zygophyllum fabago | Syrian beancaper | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Diocalandra taitensis | Tahitian coconut weevil | arthropod | beetle | not present | moderate | CDFA (reg. A) | |
| Ranunculus acris | tall buttercup | plant | herbaceous | limited | n/a (already in CA) | MT Weed List | |
| Festuca arundinacea | tall fescue | plant | grass | widespread | n/a (already in CA) | Cal-IPC list | |
| Verbena litoralis | tall vervain | plant | herbaceous | widespread | n/a (already in CA) | Cal-IPC list | |
| Senecio jacobaea | tansy ragwort | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Eucalyptus globulus | Tasmanian blue gum | plant | woody | widespread | n/a (already in CA) | Cal-IPC list | |
| Dicistroviridae TSV | Taura syndrome of shrimp; Infectious cuticular epithelial necrosis virus (ICENV) | disease | virus | VALUE REQUIRED | VALUE REQUIRED | No list | |
| Onopordum tauricum | Taurian thistle | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Parlatoria theae complex | tea paralatoria scale - species complex | arthropod | scale, aphid | not present | high | CDFA (reg. A) | |
| Fiorinia theae | tea scale | arthropod | scale, aphid | not present | high | CDFA (reg. A) | |
| Mesolecanium nigrofasciatum | terrapin scale | arthropod | scale, aphid | not present | moderate | CDFA (reg. A) | |
| Eutetranychus banksi | Texas citrus mite | arthropod | mite | limited | n/a (already in CA) | CDFA (reg. B) | |
| Phrynosoma cornutum | Texas horned lizard | vertebrate | reptile | VALUE REQUIRED | VALUE REQUIRED | FL FWCC NNS List | |
| Unknown pathogenic phytoplasma 11 | Texas phoenix palm phytoplasma | disease | phytoplasma | not present | VALUE REQUIRED | No list | |
| Geosmithia sp. | Thousand Cankers Disease Complex | disease | fungus | unknown | high | National IS Info | |
| Emex australis | three-cornered jack | plant | herbaceous | limited | n/a (already in CA) | USDA Plant/Pest | |
| Ipomoea triloba | three-cornered morning glory | plant | herbaceous | limited | n/a (already in CA) | AZ Weed List | |
| Danothrips trifasciatus | thrips | arthropod | thrips | not present | high | CDFA (reg. B) | |
| Haplothrips chinensis | thrips | arthropod | thrips | not present | high | USDA Plant/Pest | |
| Acutaspis tingi | ting scale | arthropod | scale, aphid | not present | high | CDFA (reg. A) | |
| Nepovirus trsv | Tobacco Ringspot Virus | disease | virus | VALUE REQUIRED | VALUE REQUIRED | APHIS OPIS | |
| Gekko gecko | Tokay gecko | vertebrate | reptile | not present | high | Cal Code 14:671 | |
| Nepovirus tbrv | Tomato Black Ring Virus | disease | virus | VALUE REQUIRED | VALUE REQUIRED | APHIS OPIS | |
| Tospoviruses | Tomato spot wilt virus | disease | virus | limited | VALUE REQUIRED | APHIS OPIS | |
| Begomovirus (ToTV) | Tomato Torrado Virus (ToTV) | disease | virus | not present | moderate | EPPO | |
| Tomato Yellow Leaf Curl Sardinia Virus, TYLCSV | Tomato Yellow Leaf Curl Sardinia Virus | disease | virus | not present | VALUE REQUIRED | No list | |
| Begomovirus (GEM2) | Tomato Yellow Leaf Curl Virus | disease | virus | limited | n/a (already in CA) | CDFA (reg. A) | |
| Bunyavirus (TZSV) | Tomato zonate spot virus (TZSV) | disease | virus | not present | low | NISIC | |
| Bactrocera facialis | Tongan fruit fly | arthropod | fly | not present | moderate | CDFA (reg. A) | |
| Euphorbia dentata | toothed spurge | plant | herbaceous | limited | n/a (already in CA) | CO Weed List | |
| Panicum repens | torpedo grass | plant | grass | limited | n/a (already in CA) | AZ Weed List | |
| Solanum dimidiatum | Torrey's nightshade | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Nicotiana glauca | tree tobacco | plant | woody | widespread | n/a (already in CA) | Cal-IPC list | |
| Ailanthus altissima | tree-of-heaven | plant | woody | widespread | n/a (already in CA) | Cal-IPC list | |
| Solenopsis geminata | tropical fire ant | arthropod | bee, wasp | not present | high | CDFA (reg. A) | |
| Hemidactylus mabouia | Tropical house gecko | vertebrate | reptile | VALUE REQUIRED | VALUE REQUIRED | FL FWCC NNS List | |
| Abgrallaspis palmae | tropical palm scale | arthropod | scale, aphid | not present | high | CDFA (reg. A) | |
| Hemiberlesia palmae | tropical palm scale | arthropod | scale, aphid | not present | high | CDFA (reg. A) | |
| Solanum viarum | tropical soda apple | plant | herbaceous | not present | low | USDA Plant/Pest | |
| Epitrix tuberis | tuber flea beetle | arthropod | beetle | widespread | n/a (already in CA) | CDFA (reg. B) | |
| Toumeyella liriodendri | tuliptree scale | arthropod | scale, aphid | limited | n/a (already in CA) | CDFA (reg. B) | |
| Solanum torvum | turkeyberry | plant | woody | not present | low | USDA Plant/Pest | |
| Melampsora pinitorqua | Twist Rust | disease | fungus | VALUE REQUIRED | VALUE REQUIRED | APHIS OPIS | |
| Proboscidea louisianica | unicorn-plant | plant | herbaceous | widespread | n/a (already in CA) | WA Weed List | |
| Pulvinaria urbicola | urban soft scale | arthropod | scale, aphid | limited | n/a (already in CA) | CDFA (reg. B) | |
| Ludwigia hexapetala | Uruguay water-primrose | plant | herbaceous | widespread | n/a (already in CA) | Cal-IPC list | |
| Parlatoria pseudaspidiotus | vand orchid scale | arthropod | scale, aphid | not present | high | CDFA (reg. A) | |
| Parlatoria vandae | vanda paralatoria scale | arthropod | scale, aphid | not present | high | CDFA (reg. A) | |
| Cyperus difformis | variable flatsedge | plant | herbaceous | limited | n/a (already in CA) | Weeds of CA | |
| Parus varius | Varied tit | vertebrate | bird | VALUE REQUIRED | VALUE REQUIRED | Witmer et al | |
| Varroa jacobsoni | varroa mite | arthropod | mite | widespread | n/a (already in CA) | USDA Plant/Pest | |
| Chalara australis | Vascular stain fungus | disease | fungus | VALUE REQUIRED | VALUE REQUIRED | USDA Plant/Pest | |
| Oncobasidium theobromae | Vascular Streak Die-back of cocoa | disease | fungus | VALUE REQUIRED | VALUE REQUIRED | APHIS OPIS | |
| Chamaeleo calyptratus | Veiled chameleon | vertebrate | reptile | VALUE REQUIRED | VALUE REQUIRED | FL FWCC NNS List | |
| Veinal necrosis virus (PVYN) | Veinal necrosis virus (PVYN) | disease | virus | VALUE REQUIRED | VALUE REQUIRED | APHIS OPIS | |
| Oodinium pilularis | Velvet disease | invertebrate | nematode | VALUE REQUIRED | VALUE REQUIRED | No list | |
| Digitaria velutina | velvet fingergrass | plant | grass | not present | moderate | USDA Plant/Pest | |
| Abutilon theophrasti | velvet leaf | plant | herbaceous | widespread | n/a (already in CA) | Weeds of CA | |
| Alphavirus veev | Venezuelan Equine Encephalitis Virus | disease | virus | not present | low | NIAID | |
| Graphocephala versuta | versute sharpshooter | arthropod | scale, aphid | limited | moderate | CDFA (reg. B) | |
| Cercopithecus aethiops | Vervet monkey | vertebrate | mammal | VALUE REQUIRED | n/a (already in CA) | FL FWCC NNS List | |
| Aleurotubus jelinekii | viburnum whitefly | arthropod | scale, aphid | limited | n/a (already in CA) | CDFA (reg. B) | |
| Pittosporum undulatum | Victorian box | plant | woody | limited | n/a (already in CA) | Med. plants list | |
| Planococcus ficus | vine mealybug | arthropod | scale, aphid | limited | n/a (already in CA) | CDFA (reg. B) | |
| Novirhadovirus Viral Hemorrhagic Septicemia Virus (VHSV) | Viral Hemorragic septicemia | disease | virus | not present | moderate | National IS Info | |
| Viral Hemorrhagic Septicemia Virus | Viral Hemorrhagic Septicemia (VHS) | disease | virus | VALUE REQUIRED | VALUE REQUIRED | No list | |
| Undaria pinnatifida | wakame | plant | algae | widespread | n/a (already in CA) | Cal-IPC list | |
| Clarias batrachus | Walking catfish | vertebrate | fish | not present | moderate | Cal Code 14:671 | |
| Rhagoletis boycei | walnut husk fly | arthropod | fly | not present | moderate | CDFA (reg. A) | |
| Rhagoletis juglandis | walnut husk fly | arthropod | fly | not present | moderate | CDFA (reg. A) | |
| Rhagoletis suavis | walnut husk fly | arthropod | fly | not present | moderate | CDFA (reg. A) | |
| Cervus elaphus | Wapiti | vertebrate | mammal | VALUE REQUIRED | n/a (already in CA) | ISSG 100WorstIAS | |
| Lonchura malabarica | Warbling silverbill | vertebrate | bird | VALUE REQUIRED | VALUE REQUIRED | Witmer et al | |
| Trapa bicornis | water caltrap | plant | herbaceous | not present | low | WA Weed List | |
| Eichhornia crassipes | water hyacinth | plant | herbaceous | widespread | n/a (already in CA) | Cal-IPC list | |
| Ludwigia peruviana | water primrose | plant | herbaceous | not present | moderate | CDFA | |
| Trapa natans | water-chestnut | plant | herbaceous | not present | moderate | AZ Weed List | |
| Erwinia salicis | Watermark Disease | disease | bacterium | VALUE REQUIRED | VALUE REQUIRED | APHIS OPIS | |
| Moniliophthora roreri | Watery Pod Rot | disease | fungus | VALUE REQUIRED | VALUE REQUIRED | USDA Plant/Pest | |
| Palea steindachneri | Wattle-necked softshell | vertebrate | reptile | VALUE REQUIRED | VALUE REQUIRED | Witmer et al | |
| Gaura sinuata | wavy-leaved gaura | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Cirsium undulatum | wavyleaf thistle | plant | herbaceous | limited | n/a (already in CA) | CDFA | |
| Glyceria declinata | waxy mannagrass | plant | grass | limited | n/a (already in CA) | Cal-IPC list | |
| Gerstaeckeria nobilis | weevil | arthropod | beetle | not present | moderate | CDFA (reg. A) | |
| Hyperoides humilis | weevil | arthropod | beetle | limited | n/a (already in CA) | CDFA (reg. B) | |
| Anastrepha obliqua | West Indian fruit fly | arthropod | fly | not present | moderate | CDFA (reg. A) | |
| Flavivirus 2 | West Nile Virus | disease | virus | widespread | n/a (already in CA) | Iowa State Univ | |
| Rhagoletis indifferens | western cherry fruit fly | arthropod | fly | limited | n/a (already in CA) | CDFA (reg. A) | |
| Diabrotica virgifera virgifera | western corn rootworm | arthropod | beetle | not present | high | CDFA (reg. A) | |
| Harrisina brillians | western grapeleaf skeletonizer | arthropod | butterfly, moth | widespread | n/a (already in CA) | CDFA (reg. B) | |
| Lacerta bilineata | Western green lacerta | vertebrate | reptile | VALUE REQUIRED | VALUE REQUIRED | Witmer et al | |
| Solanum tampicense | wetland nightshade | plant | woody | not present | low | USDA Plant/Pest | |
| Sitodiplosis mosellana | wheat midge | arthropod | fly | limited | n/a (already in CA) | CDFA (reg. A) | |
| Tilletia tritici (caries) | Wheat smut | disease | fungus | not present | moderate | EPPO |
