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Pulvinaria Regalis) Kongeskjoldlus (Pulvinaria regalis) Beskrivelse Videnskabeligt navn: Pulvinaria regalis Synonymer: Kaldenavn: Kongeskjoldlus Beskrivelse: Kongeskjoldlus voksne er brune, flade og rund med en diameter på ca. 4 mm. De sidder på træstammer mens de overdækker hvidlige æg masse, og som under kraftig angreb om forår og sommer kan dække store dele af stammen1. Kongeskjoldlus kan leve på 65 plantearter (fra 24 familie), men i urbane miljøer optræder hyppigt på Acer spp., Aesculus spp. og Tilia spp.2. Kongeskjoldlus oprindelsesområder kendes ikke med sikkerhed, men man mener den stammer fra Asien2. Kongeskjoldlus. Foto: Peter V. Nielsen Hunner flyver ikke Forvekslingsmuligheder - Spredningsvej og nuværende udbredelse Siden den første registrering i London i 1964 er Kongeskjoldlus formentlig blevet spredt over større afstand i Europa med transport af ornamentale planter, og lokalt med træbeskæringer1, 2. Derudover spredes små nymfer mellem træer med vinden2. Kongeskjoldlus er etableret i Frankrig, Belgien, Niederlande, Tyskland, Irland, Schweiz, Østrig og siden 2006 i Danmark1, 3. Den optræder hyppigst i haver og parker i stor og mindre byer, men kan også findes i løvskove1, 2. Kongeskjoldlus er registreret på 28 lokaliteter i perioden 2009-2015, og udbredelsen i Danmark er ukendt4. Score og baggrund Vi benytter en skala fra 1-3. 1 svarer til lav, 2 svarer til middel og 3 svarer til høj Sprednings- Levestedets Påvirkning af Påvirkning af Økonomiske Helbreds Harmonia Samlet potentiale bevarings- eller hjemme- økosystemer effekter effekter naturværdi hørende arter 3 1 1 1 2 1 6 9 Spredningspotentiale: 3 (høj). Spredningspotentialet for Kongeskjoldlus er vurderet til høj. Sandsynlighed for at Kongeskjoldlus transporteres med ornamentale planter er høj, da den kan formere sig på 65 plantearter, og de små nymfestadier, som overvintrer på grene, kan være svært at få øje på. Derudover kommer transport af beskårede træer, hvor på små nymfer sidder på træstykkerne. Levestedets bevarings- eller naturværdi: 1 (lav). Levestedets bevaringsværdi for Kongeskjoldlus er vurderet til lav. Kongeskjoldlus findes typisk i parker og haver i byer og på vejtræer1, 2. 1 Miljøstyrelsen 2017. Faktaarket er udarbejdet af COWI/IGN for Miljøstyrelsen i 2015 og revideret i 2016 af DCE. Citeres: Miljøstyrelsen 2017. Faktaark for invasive arter – Kongeskjoldlus (Pulvinaria regalis) fra www.mst.dk. Hentet dd.mm.åååå. Påvirkning af hjemmehørende arter: 1 (lav). Påvirkning af hjemmehørende arter er vurderet til lav. Eventuelle påvirkninger af træer foregår ved at Kongeskjoldlus suger træers væsker, eller ved kontaminering af bladene med honningdug (produceret af Kongeskjoldlus), hvilket forårsager svampe angreb og derefter nedsat fotosyntese2. Det er ikke dokumenteret, hvorvidt det sker. Påvirkning af økosystemer: 1 (lav). Påvirkning af økosystemer er vurderet til lav. Økonomiske effekter: 2 (middel). De økonomiske effekter for Kongeskjoldlus er vurderet til middel. Skader kan opstå på træer i planteskole, hvor erfaring fra Tyskland viser at angreb hos planteskoler synes at være stigende2. Skader på by træer beregnes ellers for at være i forbindelse med en nedsat æstetisk værdi1, 2. Helbredseffekter: 1 (lav). Helbredseffekter for Kongeskjoldlus er vurderet til lav. Der er ikke dokumenteret helbredsmæssige effekter. Total score = 9 Kilder 1 Kenis, M. 2010. 14.41 – Pulvinaria regalis Canard, 1968 – Horse chestnut scale (Hemiptera, Coccidae). BioRisk 4(2): 942 – 943. 2 Trierweiler, P., Balder, H. Spread of horse chestnut scale (Pulvinaria regalis) in Germany. Plant protection and plant health in Europe: introduction and spread of invasive species, held at Humboldt University, Berlin, Germany, 9-11 June 2005 2005 pp. 285-286. (IGN725) 3 Gertsson, C.A. 2007 Pulvinaria regalis Canard – en ny sjoldlusart fundet i Danmark. Entomologiske Meddelser 75: 147 – 149. 4 Danmarks Fugle og Natur: Kongeskjoldlus (Pulvinaria regalis) (IGN1938) 2 Miljøstyrelsen 2017. Faktaarket er udarbejdet af COWI/IGN for Miljøstyrelsen i 2015 og revideret i 2016 af DCE. Citeres: Miljøstyrelsen 2017. Faktaark for invasive arter – Kongeskjoldlus (Pulvinaria regalis) fra www.mst.dk. Hentet dd.mm.åååå. .
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