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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
Parlatoria blanchardi parlatoria date scale arthropod scale, aphid not present high CDFA (reg. A)
Parentucellia viscosa yellow glandweed plant herbaceous limited n/a (already in CA) Cal-IPC list
Paratachardina pseudolobata Lobate lac scale arthropod scale, aphid not present high CDFA (reg. A)
Paramyxovirus-1 (PMV-1) Exotic newcastle disease (END) disease virus not present high National IS Info
Paramyxovirus nv Nipah Virus disease virus VALUE REQUIRED VALUE REQUIRED CDC
Paramyxovirus mv Menangle Virus disease virus VALUE REQUIRED VALUE REQUIRED Chavarria NRDC
Paramyxovirus hv Hendra Virus disease virus VALUE REQUIRED VALUE REQUIRED CDC
Papilio demoleus lime swallowtail arthropod butterfly, moth not present moderate CDFA (reg. A)
Papaipema nebris stalk borer arthropod butterfly, moth not present moderate CDFA (reg. A)
Panicum repens torpedo grass plant grass limited n/a (already in CA) AZ Weed List
Panicum miliaceum wild proso millet plant grass limited n/a (already in CA) CO Weed List
Panicum antidotale blue panicgrass plant grass limited n/a (already in CA) CDFA
Pammene fasciana chestnut leaf roller arthropod butterfly, moth not present low USDA Plant/Pest
Palea steindachneri Wattle-necked softshell vertebrate reptile VALUE REQUIRED VALUE REQUIRED Witmer et al
Padda oryzivora Java sparrow vertebrate bird not present low Lacey Act
Pachynematus extensicornis grass sawfly arthropod bee, wasp limited n/a (already in CA) CDFA (reg. B)
Oxalis pes-caprae Bermuda buttercup plant herbaceous widespread n/a (already in CA) Cal-IPC list
Oxalis corniculata creeping woodsorrel plant herbaceous widespread n/a (already in CA) Weeds of CA
Ovis aries Feral sheep vertebrate mammal VALUE REQUIRED VALUE REQUIRED Witmer et al
Ovis ammon Mouflon sheep vertebrate mammal VALUE REQUIRED VALUE REQUIRED Witmer et al
Ovibos moshatus Musk-ox vertebrate mammal VALUE REQUIRED VALUE REQUIRED Witmer et al
Oulema melanopus cereal leaf beetle arthropod beetle not present high CDFA (reg. A)
Ottelia alismoides ducklettuce plant herbaceous not present high USDA Plant/Pest
Ostrinia nubilalis European corn borer arthropod butterfly, moth not present high CDFA (reg. A)
Osteopilus septentrionalis Cuban treefrog vertebrate amphibian not present low Cal Code 14:671
Oryzavirus ersv Echinochloa Ragged Stunt Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Oryza rufipogon red rice plant grass limited n/a (already in CA) CDFA
Oryza punctata red rice plant grass not present moderate USDA Plant/Pest
Oryza longistaminata red rice plant grass not present moderate USDA Plant/Pest
Oryx gazelle Gemsbok vertebrate mammal VALUE REQUIRED VALUE REQUIRED Witmer et al
Oryctolagus cuniculus European rabbit vertebrate mammal VALUE REQUIRED n/a (already in CA) Lacey Act
Orthotomicus erosus Mediterranean pine engraver arthropod beetle not present high CDFA (reg. B)
Orthopoxvirus cmlv Camel Pox Virus disease virus VALUE REQUIRED VALUE REQUIRED Chavarria NRDC
Orthobunyavirus akav Akabane Virus disease virus VALUE REQUIRED VALUE REQUIRED Chavarria NRDC
Ortalis vetula Plain chachalaca vertebrate bird VALUE REQUIRED VALUE REQUIRED Witmer et al
Orobanche spp. broomrape plant herbaceous limited n/a (already in CA) USDA Plant/Pest
Orobanche ramosa branched broomrape plant herbaceous limited n/a (already in CA) CDFA
Orobanche minor small broomrape plant herbaceous not present high OR Weed List
Orobanche cooperi Cooper's broomrape plant herbaceous limited n/a (already in CA) CDFA
Orgyia leucostigma whitemarked tussock moth arthropod butterfly, moth not present moderate CDFA (reg. A)
Orconectes rusticus Rusty crayfish invertebrate crustaceans and tunicates not present high NISIC
Orbivirus btv Bluetongue disease virus limited n/a (already in CA) Iowa State Univ
Orbivirus ahsv African Horse Sickness Virus disease virus VALUE REQUIRED VALUE REQUIRED Chavarria NRDC
Opuntia aurantiaca jointed prickly pear plant herbaceous not present low USDA Plant/Pest
Opogona sacchari banana moth arthropod butterfly, moth not present high USDA Plant/Pest
Ophiostoma valdivianum Blue Stain of Beech disease fungus not present moderate ForestPathology
Ophiostoma pluriannulatum Wood stain disease fungus VALUE REQUIRED VALUE REQUIRED USDA Plant/Pest
Ophiostoma piliferum Blue stain disease fungus VALUE REQUIRED VALUE REQUIRED USDA Plant/Pest
Ophiostoma piceaperdum Laural Wilt disease fungus VALUE REQUIRED VALUE REQUIRED USDA Plant/Pest
Ophiostoma piceae Blue stain disease fungus VALUE REQUIRED VALUE REQUIRED USDA Plant/Pest
Ophiostoma ips Blue Stain Fungus disease fungus VALUE REQUIRED VALUE REQUIRED USDA Plant/Pest
Ophiostoma huntii Blue Stain disease fungus VALUE REQUIRED VALUE REQUIRED USDA Plant/Pest
Ophiostoma (Ceratocystis) ulmi Dutch elm disease disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Ophiomyia phaseoli bean fly arthropod fly not present low CDFA (reg. A)
Oospora oryzetorum Blight disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Oodinium pilularis Velvet disease invertebrate nematode VALUE REQUIRED VALUE REQUIRED No list
Onopordum tauricum Taurian thistle plant herbaceous limited n/a (already in CA) CDFA
Onopordum illyricum Illyrian thistle plant herbaceous limited n/a (already in CA) CDFA
Onopordum acanthium Scotch thistle plant herbaceous limited n/a (already in CA) CDFA
Ononis alopecuroides foxtail restharrow plant herbaceous limited n/a (already in CA) CDFA
Oncobasidium theobromae Vascular Streak Die-back of cocoa disease fungus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Omphisa anastomosalis sweetpotato vine borer arthropod beetle not present moderate USDA Plant/Pest
Olea europaea olive plant woody limited n/a (already in CA) Cal-IPC list
Okra Yellow Leaf Curl Agent Okra Yellow Leaf Curl Agent disease virus VALUE REQUIRED VALUE REQUIRED No list
Okra Mosaic Agents Okra Mosaic Agents disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Oebalus pugnax rice stink bug arthropod scale, aphid not present high CDFA (reg. A)
Odocoileus hemionus Black-tailed deer vertebrate mammal VALUE REQUIRED VALUE REQUIRED Witmer et al
Oat Red Streak Mosaic Virus Oat Red Streak Mosaic Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Nymphoides peltata yellow floating heart plant herbaceous limited n/a (already in CA) OR Weed List
Nymphicus hollandicus Cockatiel vertebrate bird VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Nymphaea odorata fragrant waterlily plant herbaceous limited n/a (already in CA) WA Weed List
Nymphaea mexicana banana waterlily plant herbaceous limited n/a (already in CA) CDFA
Nyctereutes procyonoides Racoon dog vertebrate mammal VALUE REQUIRED VALUE REQUIRED Lacey Act
Numida meleagris Helmeted guineafowl vertebrate bird VALUE REQUIRED VALUE REQUIRED FL FWCC NNS List
Nucleorhabdovirus lev Lucerne enation virus disease virus VALUE REQUIRED VALUE REQUIRED No list
Nucleorhabdovirus immv Iranian Maize Mosaic Virus disease virus VALUE REQUIRED VALUE REQUIRED No list
Nucleorhabdovirus ccsv Cynodon Chlorotic Streak Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Nucleorhabdovirus ccmv Cereal Chlorotic Mosaic Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Novirhadovirus Viral Hemorrhagic Septicemia Virus (VHSV) Viral Hemorragic septicemia disease virus not present moderate National IS Info
Nothoscordum inodorum false garlic plant herbaceous limited n/a (already in CA) CDFA
Nilotaspis halli Hall scale arthropod scale, aphid not present high CDFA (reg. A)
Nicotiana glauca tree tobacco plant woody widespread n/a (already in CA) Cal-IPC list
Nerodia rhombifer Diamondback water snake vertebrate reptile not present high Cal Code 14:671
Nerodia fasciata Southern Watersnake vertebrate reptile limited high Cal Code 14:671
Nerium oleander oleander plant woody limited n/a (already in CA) Med. plants list
Nepovirus trsv Tobacco Ringspot Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Nepovirus tbrv Tomato Black Ring Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Nepovirus slrsv Strawberry Latent Ringspot Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Nepovirus rprsv Raspberry ringspot virus and its strains disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Nepovirus pvu Potato Virus U disease virus VALUE REQUIRED VALUE REQUIRED No list
Nepovirus lasv Lucerne Australian Symptomless Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Nepovirus lalv Lucerne Vein Yellowing Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Nepovirus gtrsv Grapevine Tunisian Ringspot Virus disease virus not present low APHIS OPIS
Nepovirus gcmv Grapevine Chrome Mosaic Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Nepovirus gblv Grapevine Bulgarian Latent Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Nepovirus csalv Cassava Latent Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Nepovirus cnv Cocoa Necrosis Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Nepovirus brv Black Currant Reversion Virus disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Nepovirus avb Arracacha Virus B disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS
Nepovirus armv Arabis mosaic virus and its strains disease virus VALUE REQUIRED VALUE REQUIRED APHIS OPIS