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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
Toxotrypana curvicauda papaya fruit fly arthropod fly not present moderate CDFA (reg. A)
Gyrodactylus elegans Parasitic flatworm of fish invertebrate nematode VALUE REQUIRED VALUE REQUIRED No list
Pestalotiopsis disseminata Parasitic Leaf Fungus disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Mitraspora cyprini Fujita Parasitic protozoan of fish invertebrate nematode VALUE REQUIRED VALUE REQUIRED No list
Phytoplasma parastolbur-mlo Parastolbur disease phytoplasma VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Parlatoria blanchardi parlatoria date scale arthropod scale, aphid not present high CDFA (reg. A)
Cotoneaster lacteus Parney's cotoneaster plant woody limited n/a (already in CA) Cal-IPC list
Chrysophtharta m-fuscum paropsine leaf beetle arthropod beetle limited n/a (already in CA) CDFA (reg. B)
Myriophyllum aquaticum parrotfeather plant herbaceous limited n/a (already in CA) Cal-IPC list
Ichthyophithirius multifilis Parsitic protozoan of fish invertebrate nematode VALUE REQUIRED VALUE REQUIRED No list
Planococcus minor (Maskell) Passionvine mealybug arthropod scale, aphid not present high CDFA (reg. A)
Echium plantagineum Paterson's curse plant herbaceous limited n/a (already in CA) OR Weed List
Liriomyza huidobrensis pea leafminer arthropod fly widespread n/a (already in CA) CDFA (reg. A)
Phloeotribus liminarius peach bark beetle arthropod beetle not present high CDFA (reg. B)
Bactrocera zonata Peach fruit fly arthropod fly not present moderate CDFA (reg. A)
Carposina niponensis peach fruit moth arthropod butterfly, moth not present low USDA Plant/Pest
Pecluvirus pcv Peanut Clump Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Apscaviroid pbcvd Pear Blister Canker Viroid disease virus VALUE REQUIRED VALUE REQUIRED No list
Pear Bud Drop Agent Pear Bud Drop Agent disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Leucoptera malifoliella pear leaf blister moth arthropod butterfly, moth not present moderate USDA Plant/Pest
Acrobasis juglandis pecan leaf casebearer arthropod butterfly, moth not present moderate CDFA (reg. A)
Acrobasis nuxvorella pecan nut casebearer arthropod butterfly, moth not present high CDFA (reg. A)
Phylloxera devastatrix pecan phylloxera arthropod scale, aphid not present moderate CDFA (reg. A)
Curculio caryae pecan weevil arthropod beetle not present moderate CDFA (reg. A)
Mentha pulegium pennyroyal plant herbaceous widespread n/a (already in CA) Cal-IPC list
Pseudaonidia paeoniae peony scale arthropod scale, aphid not present high CDFA (reg. A)
Tildenia gudmannella pepper flower bud moth arthropod butterfly, moth not present moderate CDFA (reg. A)
Zonosemata electa pepper maggot arthropod fly not present moderate CDFA (reg. A)
Brachypodium sylvaticum perennial false-brome plant grass limited n/a (already in CA) Cal-IPC list
Lepidium latifolium perennial pepperweed plant herbaceous widespread n/a (already in CA) CDFA
Sonchus arvensis perennial sowthistle plant herbaceous limited n/a (already in CA) CDFA
Sorghum bicolor perennial sweet Sudan plant grass limited n/a (already in CA) NV Weed List
Magicicada septendecim periodical cicada arthropod scale, aphid not present low CDFA (reg. A)
Sannina uroceriformis persimmon borer arthropod butterfly, moth not present moderate CDFA (reg. A)
Acremonium (Cephalosporium) diospyri Persimmon Wilt disease fungus not present moderate ForestPests.org
Schinus molle Peruvian peppertree plant woody limited n/a (already in CA) Cal-IPC list
Morbillivirus ppr Peste des Petits Ruminants; disease virus VALUE REQUIRED VALUE REQUIRED Chavarria NRDC
Phaeoramularia angolensis Phaeoramularia Fruit and Leaf Spot disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Phialophora cinerescens Phialophora wilt of carnations and strawberries disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Peronosclerospora philippinensis (aka, sacchari) Philippine Downy mildew of sorghum/Select Agent disease oomycete not present VALUE REQUIRED No list
Phomopsis vaccinii Phomopsis soft rot disease fungus not present moderate Mycologia
Phyllody Agent Phyllody Agent disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Phyllosticta colocasiophila Phyllosticta Leafspot disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Candidatus australiense Phytoplasma Yellows disease bacterium VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Pontederia cordata pickerelweed plant herbaceous not present moderate CDFA
Diaphania nitidalis pickleworm arthropod butterfly, moth limited n/a (already in CA) CDFA (reg. B)
Xylella fastidiosa Pierce's Disease/grapevine disease bacterium limited moderate CDFA PD/GWSS
Chrysopogon aciculatus pilipiliula plant grass not present low USDA Plant/Pest
Tomicus piniperda pine shoot beetle arthropod beetle not present high CDFA (reg. A)
Steneotarsonemus ananas pineapple tarsonemid arthropod mite limited n/a (already in CA) CDFA (reg. B)
Pectinophora gossypiella pink bollworm arthropod butterfly, moth limited n/a (already in CA) CDFA (reg. A)
Erythricium salmonicolor Pink Disease disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Maconellicoccus hirsutus Pink hibiscus mealybug arthropod scale, aphid limited n/a (already in CA) CDFA (reg. A)
Sturnus roseus Pink starling vertebrate bird VALUE REQUIRED VALUE REQUIRED Lacey Act
Saccharicoccus sacchari pink sugarcane mealybug arthropod scale, aphid not present moderate CDFA (reg. A)
Pectinophora scutigera pink-spotted bollworm arthropod butterfly, moth not present high USDA Plant/Pest
Serrasalminae Piranha vertebrate fish not present high FL FWCC NNS List
Eriococcus pittospori pittosporum scale arthropod scale, aphid limited n/a (already in CA) CDFA (reg. B)
Lampropholis delicate Plague skink vertebrate reptile VALUE REQUIRED VALUE REQUIRED Witmer et al
Ortalis vetula Plain chachalaca vertebrate bird VALUE REQUIRED VALUE REQUIRED Witmer et al
Cnemidophorus velox Plateau striped whiptail vertebrate reptile VALUE REQUIRED VALUE REQUIRED Witmer et al
Plum Bark Split Virus Plum Bark Split Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Conotrachelus nenuphar plum curculio arthropod beetle not present high CDFA (reg. A)
Coccotorus scutellaris plum gouger arthropod beetle not present moderate CDFA (reg. A)
Potyviruses: Potyviridae Plum pox disease virus not present moderate APHIS OPIS
Potyvirus ppv Plum Pox Virus disease virus not present high APHIS OPIS
Albizia lophantha plume acacia plant woody limited n/a (already in CA) Cal-IPC list
Carduus acanthoides plumeless thistle plant herbaceous limited n/a (already in CA) CDFA
Morganella longispina plumose scale arthropod scale, aphid not present high CDFA (reg. A)
Conium maculatum poison-hemlock plant herbaceous widespread n/a (already in CA) Cal-IPC list
Hieracium atratum polar hawkweed plant herbaceous not present low WA Weed List
Poliaspis cycadis Poliaspis cycad scale arthropod scale, aphid not present high CDFA (reg. A)
Impatiens glandulifera policeman's helmet plant herbaceous not present moderate OR Weed List
Rattus exulans Polynesian rat vertebrate mammal VALUE REQUIRED VALUE REQUIRED Witmer et al
Xanthomonas populi Poplar Canker disease bacterium VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Cytisus striatus Portuguese broom plant woody limited n/a (already in CA) Cal-IPC list
Pseudomonas lignicola Potato Leaflet Stunt disease bacterium VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Unknown pathogenic phytoplasma 6 Potato Marginal Flavescence disease phytoplasma VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Carlavirus pvm Potato Mop Top Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Unknown pathogenic phytoplasma 7 Potato Purple Top Roll disease phytoplasma VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Thecaphora (Angiosorus) solani Potato smut disease fungus not present low EPPO
Potexvirus (?) or Potyvirus (?) Potato veinal necrosis virus (PVYN) disease virus VALUE REQUIRED VALUE REQUIRED No list
Trichovirus pvt Potato Virus T disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Nepovirus pvu Potato Virus U disease virus VALUE REQUIRED VALUE REQUIRED No list
Potyvirus pvv Potato Virus V disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Potyvirus pvy Potato Virus Y disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Synchytrium endobioticum Potato Wart/Select Agent disease fungus not present low EPPO
Unknown pathogenic phytoplasma 8 Potato witches broom disease phytoplasma VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Crinivirus pyvv Potato Yellow Vein Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Alfamovirus pyv Potato Yellowing Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Candidatus Liberibacter solanacearum potato zebra chip disease bacterium not present VALUE REQUIRED APHIS OPIS
Cynomys ludovicianus Prairie dog vertebrate mammal not present low CDFA Vert List
Lactuca serriola prickly lettuce plant herbaceous widespread n/a (already in CA) Weeds of CA
Echium candicans pride-of-Madeira plant herbaceous limited n/a (already in CA) Cal-IPC list
Dendrothrips ornatus privet thrips arthropod thrips limited n/a (already in CA) CDFA (reg. B)
Proeulia spp. Proeulia spp. arthropod butterfly, moth not present low USDA Plant/Pest
Amaranthus albus prostrate pigweed plant herbaceous widespread n/a (already in CA) Weeds of CA
Protopalina symphysodonis Protopalina symphysodonis infection of fish invertebrate nematode VALUE REQUIRED VALUE REQUIRED No list
Trichodinella epizootica Protozoic parasite of fish invertebrate nematode VALUE REQUIRED VALUE REQUIRED No list
Myxobolus (Lentospora) cerebralis Protozoic Whirling disease disease parasitic animal limited n/a (already in CA) National IS Info