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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
Unknown pathogenic phytoplasma 6 Potato Marginal Flavescence disease phytoplasma VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Pseudomonas lignicola Potato Leaflet Stunt disease bacterium VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Cytisus striatus Portuguese broom plant woody limited n/a (already in CA) Cal-IPC list
Xanthomonas populi Poplar Canker disease bacterium VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Rattus exulans Polynesian rat vertebrate mammal VALUE REQUIRED VALUE REQUIRED Witmer et al
Impatiens glandulifera policeman's helmet plant herbaceous not present moderate OR Weed List
Poliaspis cycadis Poliaspis cycad scale arthropod scale, aphid not present high CDFA (reg. A)
Hieracium atratum polar hawkweed plant herbaceous not present low WA Weed List
Conium maculatum poison-hemlock plant herbaceous widespread n/a (already in CA) Cal-IPC list
Morganella longispina plumose scale arthropod scale, aphid not present high CDFA (reg. A)
Carduus acanthoides plumeless thistle plant herbaceous limited n/a (already in CA) CDFA
Albizia lophantha plume acacia plant woody limited n/a (already in CA) Cal-IPC list
Potyvirus ppv Plum Pox Virus disease virus not present high APHIS OPIS
Potyviruses: Potyviridae Plum pox disease virus not present moderate APHIS OPIS
Coccotorus scutellaris plum gouger arthropod beetle not present moderate CDFA (reg. A)
Conotrachelus nenuphar plum curculio arthropod beetle not present high CDFA (reg. A)
Plum Bark Split Virus Plum Bark Split Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Cnemidophorus velox Plateau striped whiptail vertebrate reptile VALUE REQUIRED VALUE REQUIRED Witmer et al
Ortalis vetula Plain chachalaca vertebrate bird VALUE REQUIRED VALUE REQUIRED Witmer et al
Lampropholis delicate Plague skink vertebrate reptile VALUE REQUIRED VALUE REQUIRED Witmer et al
Eriococcus pittospori pittosporum scale arthropod scale, aphid limited n/a (already in CA) CDFA (reg. B)
Serrasalminae Piranha vertebrate fish not present high FL FWCC NNS List
Pectinophora scutigera pink-spotted bollworm arthropod butterfly, moth not present high USDA Plant/Pest
Saccharicoccus sacchari pink sugarcane mealybug arthropod scale, aphid not present moderate CDFA (reg. A)
Sturnus roseus Pink starling vertebrate bird VALUE REQUIRED VALUE REQUIRED Lacey Act
Maconellicoccus hirsutus Pink hibiscus mealybug arthropod scale, aphid limited n/a (already in CA) CDFA (reg. A)
Erythricium salmonicolor Pink Disease disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Pectinophora gossypiella pink bollworm arthropod butterfly, moth limited n/a (already in CA) CDFA (reg. A)
Steneotarsonemus ananas pineapple tarsonemid arthropod mite limited n/a (already in CA) CDFA (reg. B)
Tomicus piniperda pine shoot beetle arthropod beetle not present high CDFA (reg. A)
Chrysopogon aciculatus pilipiliula plant grass not present low USDA Plant/Pest
Xylella fastidiosa Pierce's Disease/grapevine disease bacterium limited moderate CDFA PD/GWSS
Diaphania nitidalis pickleworm arthropod butterfly, moth limited n/a (already in CA) CDFA (reg. B)
Pontederia cordata pickerelweed plant herbaceous not present moderate CDFA
Candidatus australiense Phytoplasma Yellows disease bacterium VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Phyllosticta colocasiophila Phyllosticta Leafspot disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Phyllody Agent Phyllody Agent disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Phomopsis vaccinii Phomopsis soft rot disease fungus not present moderate Mycologia
Peronosclerospora philippinensis (aka, sacchari) Philippine Downy mildew of sorghum/Select Agent disease oomycete not present VALUE REQUIRED No list
Phialophora cinerescens Phialophora wilt of carnations and strawberries disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Phaeoramularia angolensis Phaeoramularia Fruit and Leaf Spot disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Morbillivirus ppr Peste des Petits Ruminants; disease virus VALUE REQUIRED VALUE REQUIRED Chavarria NRDC
Schinus molle Peruvian peppertree plant woody limited n/a (already in CA) Cal-IPC list
Acremonium (Cephalosporium) diospyri Persimmon Wilt disease fungus not present moderate ForestPests.org
Sannina uroceriformis persimmon borer arthropod butterfly, moth not present moderate CDFA (reg. A)
Magicicada septendecim periodical cicada arthropod scale, aphid not present low CDFA (reg. A)
Sorghum bicolor perennial sweet Sudan plant grass limited n/a (already in CA) NV Weed List
Sonchus arvensis perennial sowthistle plant herbaceous limited n/a (already in CA) CDFA
Lepidium latifolium perennial pepperweed plant herbaceous widespread n/a (already in CA) CDFA
Brachypodium sylvaticum perennial false-brome plant grass limited n/a (already in CA) Cal-IPC list
Zonosemata electa pepper maggot arthropod fly not present moderate CDFA (reg. A)
Tildenia gudmannella pepper flower bud moth arthropod butterfly, moth not present moderate CDFA (reg. A)
Pseudaonidia paeoniae peony scale arthropod scale, aphid not present high CDFA (reg. A)
Mentha pulegium pennyroyal plant herbaceous widespread n/a (already in CA) Cal-IPC list
Curculio caryae pecan weevil arthropod beetle not present moderate CDFA (reg. A)
Phylloxera devastatrix pecan phylloxera arthropod scale, aphid not present moderate CDFA (reg. A)
Acrobasis nuxvorella pecan nut casebearer arthropod butterfly, moth not present high CDFA (reg. A)
Acrobasis juglandis pecan leaf casebearer arthropod butterfly, moth not present moderate CDFA (reg. A)
Leucoptera malifoliella pear leaf blister moth arthropod butterfly, moth not present moderate USDA Plant/Pest
Pear Bud Drop Agent Pear Bud Drop Agent disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Apscaviroid pbcvd Pear Blister Canker Viroid disease virus VALUE REQUIRED VALUE REQUIRED No list
Pecluvirus pcv Peanut Clump Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Carposina niponensis peach fruit moth arthropod butterfly, moth not present low USDA Plant/Pest
Bactrocera zonata Peach fruit fly arthropod fly not present moderate CDFA (reg. A)
Phloeotribus liminarius peach bark beetle arthropod beetle not present high CDFA (reg. B)
Liriomyza huidobrensis pea leafminer arthropod fly widespread n/a (already in CA) CDFA (reg. A)
Echium plantagineum Paterson's curse plant herbaceous limited n/a (already in CA) OR Weed List
Planococcus minor (Maskell) Passionvine mealybug arthropod scale, aphid not present high CDFA (reg. A)
Ichthyophithirius multifilis Parsitic protozoan of fish invertebrate nematode VALUE REQUIRED VALUE REQUIRED No list
Myriophyllum aquaticum parrotfeather plant herbaceous 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)
Cotoneaster lacteus Parney's cotoneaster plant woody limited n/a (already in CA) Cal-IPC list
Parlatoria blanchardi parlatoria date scale arthropod scale, aphid not present high CDFA (reg. A)
Phytoplasma parastolbur-mlo Parastolbur disease phytoplasma VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Mitraspora cyprini Fujita Parasitic protozoan of fish invertebrate nematode VALUE REQUIRED VALUE REQUIRED No list
Pestalotiopsis disseminata Parasitic Leaf Fungus disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Gyrodactylus elegans Parasitic flatworm of fish invertebrate nematode VALUE REQUIRED VALUE REQUIRED No list
Toxotrypana curvicauda papaya fruit fly arthropod fly not present moderate CDFA (reg. A)
Allium paniculatum panicled onion plant herbaceous limited n/a (already in CA) CDFA
Steneotarsonemus spinki panicle rice mite arthropod mite not present high CDFA (reg. A)
Cortaderia selloana pampasgrass plant grass widespread n/a (already in CA) Cal-IPC list
Unknown pathogenic phytoplasma 5 Palm Lethal Yellowing Phytoplasma disease phytoplasma VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Homaledra sabalella palm leafskeletonizer arthropod butterfly, moth limited n/a (already in CA) CDFA (reg. B)
Molossus molossus Pallas’s mastiff bat vertebrate mammal VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Hylobius pales pales weevil arthropod beetle not present high CDFA (reg. A)
Halysidota tessellaris pale tussock moth arthropod butterfly, moth not present moderate CDFA (reg. A)
Globodera pallida Pale cyst nematode invertebrate nematode not present moderate NAPPA Phyto
Acaena pallida pale biddy-biddy plant herbaceous limited n/a (already in CA) CDFA
Chrysemys picta Painted turtle vertebrate reptile VALUE REQUIRED n/a (already in CA) DFG Code 2118
Cucumis myriocarpus paddy melon plant herbaceous limited n/a (already in CA) CDFA
Cryptoblepharus poecilopleurus Pacific snake-eyed skink vertebrate reptile VALUE REQUIRED VALUE REQUIRED Witmer et al
Agrostis avenacea Pacific bentgrass plant grass limited n/a (already in CA) Cal-IPC list
Lagarosiphon major oxygenweed plant herbaceous not present moderate CDFA
Senecio squalidus Oxford ragwort plant herbaceous not present low CDFA
Leucanthemum vulgare ox-eye daisy plant herbaceous widespread n/a (already in CA) Cal-IPC list
Corbula amurensis Overbite clam invertebrate aquatic mollusk, marine limited n/a (already in CA) Exoticsguide
Aegilops ovata ovate goatgrass plant grass limited n/a (already in CA) CDFA
Polygonum arenastrum oval leaf knotweed plant herbaceous widespread n/a (already in CA) Weeds of CA
Horidiplosis ficifolii Ornamental fig pest arthropod fly not present low Univ. Florida
Aonidiella orientalis oriental scale arthropod scale, aphid not present high CDFA (reg. A)