18/10/2018 Unaspis citri (citrus snow scale) (/ISC/) Invasive Species Compendium Detailed coverage of invasive species threatening livelihoods and the environment worldwide Filter by type Search Datasheet Additional resources (/ISC/datasheet/additionalresources/55685?scientificName=Unaspis%20citri) Unaspis citri (citrus snow scale) Toolbox Horizon Scanning Tool (https://www.cabi.org/HorizonScanningTool) Mobile Apps (https://play.google.com/store/apps/dev?id=8227528954463674373&hl=en_GB) Country Pest Alerts (https://www.plantwise.org/KnowledgeBank/PestAlertsSignUp.aspx) Datasheet Unaspis citri (citrus snow scale) Index Pictures Identity Taxonomic Tree Description Distribution Distribution Table Risk of Introduction https://www.cabi.org/isc/datasheet/55685Hosts/Species Affected 1/17 18/10/2018 Host Plants and Other Plants Affected Unaspis citri (citrus snow scale) Growth Stages Symptoms List of Symptoms/Signs Biology and Ecology Natural enemies Notes on Natural Enemies Impact Detection and Inspection Similarities to Other Species/Conditions Prevention and Control References Distribution Maps Summary Last modified 29 March 2018 Datasheet Type(s) Invasive Species Pest Preferred Scientific Name Unaspis citri Preferred Common Name citrus snow scale More information Taxonomic Tree Domain: Eukaryota Kingdom: Metazoa Phylum: Arthropoda Subphylum: Uniramia Class: Insecta More information Don't need the entire report? Generate a print friendly version containing only the sections you need. Generate report (/ISC/datasheetreport/55685) Pictures Top of page Picture Title Caption Copyright Adult Adult female scales mussel or oyster-shell shaped, brown-black with a lighter coloured mar Crown gin, moderately convex, often with a distinct longitudinal dorsal ridge, 2.25 mm. Pictured on Copyright lime fruit from El Salvador. https://www.cabi.org/isc/datasheet/55685 2/17 18/10/2018 Unaspis citri (citrus snow scale) Identity Top of page Preferred Scientific Name Unaspis citri (Comstock, 1883) Preferred Common Name citrus snow scale Other Scientific Names Chionaspis annae Malenotti Chionaspis citri Comstock, 1883 Dinaspis annae Malenotti Dinaspis veitchi Green & Laing, 1923 Prontaspis citri (Comstock) MacGillivray, 1921 Unaspis annae Malenotti International Common Names English: orange chionaspis; orange snow scale; white louse scale Spanish: cochinilla blanca de los citrus; cochinilla blanca del tronco; escama de nieve de los cítricos; escama de nieve de los citricos (mexico); guagua nevada de los cítricos; piojo bianco; piojo blanco de los citricos (mexico); piojo harinoso de los citricos; queresa del naranjo Portuguese: cochonilha branca da aranjeira (brasil) Local Common Names Brazil: cochonilha branca da aranjeira Germany: schneeweisse citrus-schildlaus EPPO code UNASCI (Unaspis citri) Taxonomic Tree Top of page Domain: Eukaryota Kingdom: Metazoa Phylum: Arthropoda Subphylum: Uniramia Class: Insecta Order: Hemiptera Suborder: Sternorrhyncha Unknown: Coccoidea Family: Diaspididae Genus: Unaspis Species: Unaspis citri Description Top of page The adult female scales are mussel or oyster-shell shaped, brown or brown-black with a lighter coloured margin, moderately convex and often have a distinct longitudinal dorsal ridge. The scales attain a length of 2.25 mm. The male scales are smaller, white, felted, elongate oval in shape with three longitudinal ridges. The exuviae of both sexes are terminal and brownish-yellow. Authoritative identification involves detailed microscopic examination of slide-mounted, teneral, adult females. Detailed morphological descriptions, illustrations and keys to Unaspis are provided by Balachowsky (1954), Ferris (1937) and Williams and Watson (1988). https://www.cabi.org/isc/datasheet/55685 3/17 18/10/2018 Unaspis citri (citrus snow scale) Distribution Top of page U. citri originated in Asia and has spread widely in other tropical and subtropical regions. It is now found in North, Central and South America, Africa and Oceania (see the computer-generated maps and CIE, 1962 for an exact list of countries). The pest was found in Portugal (Azores) in the 1920s, but there have been no records since. See also CABI/EPPO (1998, No. 154). https://www.cabi.org/isc/datasheet/55685 4/17 18/10/2018 Unaspis citri (citrus snow scale) Distribution Table Top of page The distribution in this summary table is based on all the information available. When several references are cited, they may give conflicting information on the status. Further details may be available for individual references in the Distribution Table Details section which can be selected by going to Generate Report. Continent/Country/Region Distribution Last Origin First Invasive Reference Notes Reported Reported Asia China (/isc/datasheet/108398) Present EPPO, 2014 -Guangdong Present CIE, 1962; EPPO, (/isc/datasheet/108671) 2014 -Hong Kong Present CIE, 1962; EPPO, (/isc/datasheet/108678) 2014 -Hubei (/isc/datasheet/108676) Present CIE, 1962; EPPO, 2014 Indonesia Present EPPO, 2014 (/isc/datasheet/108455) -Java (/isc/datasheet/108714) Present CIE, 1962; EPPO, 2014 Japan (/isc/datasheet/108467) Present EPPO, 2014 Malaysia (/isc/datasheet/108514) Present EPPO, 2014 -Peninsular Malaysia Present CIE, 1962; EPPO, (/isc/datasheet/108765) 2014 Singapore Present CIE, 1962; EPPO, (/isc/datasheet/108557) 2014 Syria (/isc/datasheet/108572) Present EPPO, 2014 Vietnam (/isc/datasheet/108604) Present CIE, 1962; EPPO, 2014 Yemen (/isc/datasheet/108609) Widespread EPPO, 2014 Africa Benin (/isc/datasheet/108375) Present CIE, 1962; EPPO, 2014 Cameroon Present EPPO, 2014 (/isc/datasheet/108397) Comoros (/isc/datasheet/108474) Present EPPO, 2014 Congo (/isc/datasheet/108392) Present EPPO, 2014 Congo Democratic Republic Present CIE, 1962; EPPO, (/isc/datasheet/108615) 2014 Côte d'Ivoire Present CIE, 1962; EPPO, (/isc/datasheet/108394) 2014 Egypt (/isc/datasheet/108418) Present EPPO, 2014 Gabon (/isc/datasheet/108430) Present EPPO, 2014 Guinea (/isc/datasheet/108440) Present CIE, 1962; EPPO, 2014 https://www.cabi.org/isc/datasheet/55685 5/17 18/10/2018 Unaspis citri (citrus snow scale) Continent/Country/Region Distribution Last Origin First Invasive Reference Notes Reported Reported Madagascar Present EPPO, 2014 (/isc/datasheet/108498) Mauritius Present CIE, 1962; EPPO, (/isc/datasheet/108510) 2014 Niger (/isc/datasheet/108518) Present EPPO, 2014 Nigeria (/isc/datasheet/108520) Present CIE, 1962; EPPO, 2014 Senegal (/isc/datasheet/108564) Present EPPO, 2014 Sierra Leone Present CIE, 1962; EPPO, (/isc/datasheet/108562) 2014 Togo (/isc/datasheet/108579) Present CIE, 1962; EPPO, 2014 North America Bermuda Present CIE, 1962; EPPO, (/isc/datasheet/108377) 2014 Mexico (/isc/datasheet/108513) Present CIE, 1962; EPPO, 2014 USA (/isc/datasheet/108597) Restricted EPPO, 2014 distribution -California Present CIE, 1962; EPPO, (/isc/datasheet/108799) 2014 -Florida (/isc/datasheet/108804) Present CIE, 1962; EPPO, 2014 -Georgia (/isc/datasheet/108805) Present CIE, 1962; EPPO, 2014 -Louisiana Present CIE, 1962; EPPO, (/isc/datasheet/108813) 2014 Central America and Caribbean Antigua and Barbuda Present CIE, 1962; EPPO, (/isc/datasheet/108352) 2014 Barbados Present CIE, 1962; EPPO, (/isc/datasheet/108368) 2014 British Virgin Islands Present CIE, 1962; EPPO, (/isc/datasheet/108602) 2014 Costa Rica Present (/isc/datasheet/108402) Cuba (/isc/datasheet/108405) Present CIE, 1962; EPPO, 2014 Dominica Present CIE, 1962; EPPO, (/isc/datasheet/108413) 2014 Dominican Republic Present CIE, 1962; EPPO, (/isc/datasheet/108414) 2014 El Salvador Present EPPO, 2014 (/isc/datasheet/108571) Grenada (/isc/datasheet/108432) Present CIE, 1962; EPPO, 2014 https://www.cabi.org/isc/datasheet/55685 6/17 18/10/2018 Unaspis citri (citrus snow scale) Continent/Country/Region Distribution Last Origin First Invasive Reference Notes Reported Reported Guadeloupe Present CIE, 1962; EPPO, (/isc/datasheet/108441) 2014 Haiti (/isc/datasheet/108453) Present CIE, 1962; EPPO, 2014 Honduras Present EPPO, 2014 (/isc/datasheet/108451) Jamaica (/isc/datasheet/108465) Present CIE, 1962; EPPO, 2014 Martinique Present EPPO, 2014 (/isc/datasheet/108506) Montserrat Present CIE, 1962; EPPO, (/isc/datasheet/108508) 2014 Panama (/isc/datasheet/108530) Present CIE, 1962; EPPO, 2014 Puerto Rico Present CIE, 1962; EPPO, (/isc/datasheet/108541) 2014 Saint Kitts and Nevis Restricted CIE, 1962; EPPO, (/isc/datasheet/108475) distribution 2014 Saint Lucia Present CIE, 1962; EPPO, (/isc/datasheet/108483) 2014 Saint Vincent and the Present CIE, 1962; EPPO, Grenadines 2014 (/isc/datasheet/108600) Trinidad and Tobago Present CIE, 1962; EPPO, (/isc/datasheet/108588) 2014 United States Virgin Islands Present CIE, 1962; EPPO, (/isc/datasheet/108603) 2014 South America Argentina Present CIE, 1962; EPPO, (/isc/datasheet/108359) 2014 Bolivia (/isc/datasheet/108379) Present EPPO, 2014 Brazil (/isc/datasheet/108381) Present EPPO, 2014 -Espirito Santo Present Culik et al., 2009 (/isc/datasheet/108632) -Rio de Janeiro Present CIE, 1962; EPPO, (/isc/datasheet/108644) 2014 -Rio Grande do Sul Present CIE, 1962; EPPO, (/isc/datasheet/108648) 2014 -Sao Paulo Present CIE, 1962; EPPO, (/isc/datasheet/108651) 2014 Chile (/isc/datasheet/108396) Present CIE, 1962; EPPO, 2014 Colombia Present CIE, 1962; EPPO, (/isc/datasheet/108399) 2014 Ecuador (/isc/datasheet/108416) Present CIE, 1962; EPPO, 2014 https://www.cabi.org/isc/datasheet/55685 7/17 18/10/2018 Unaspis citri (citrus snow scale) Continent/Country/Region Distribution Last Origin First Invasive Reference Notes Reported Reported Guyana