Planchonia arabidis Signoret, 1876

pittosporum pit scale

on all sorts of plants

Planchonia arabidis:  galls on Hedera helix

Hedera helix (cultivar), Hongarije, Mosonmagyaróvár, mid-May © László Érsek

Planchonia arabidis:  galls on Hedera helix

gall

Planchonia arabidis:  galls on Hedera helix

note the discrepancy between the size of the galling and the size of the young scale.

Planchonia arabidis:  galls on Hedera helix

mid-August

Planchonia arabidis:  galls on Hedera helix

the entire plant is severely damaged

Planchonia arabidis:  scale

the full-grown scale

Planchonia arabidis: gall on Hedera helix

Hedera helix, France, Corsica, Feliceto, Mare e Monti © Stéphane Claerebout

Planchonia arabidis: gall on Hedera helix

damage

Planchonia arabidis: gall on Hedera helix

also leaves become disfigured

Planchonia arabidis: gall on Hedera helix

the scale

Planchonia arabidis: scale

© Raymond Gill, California Department of Food and Agriculture

Planchonia arabidis on Bupleurum falcatum

Bupleurum falcatum, Belgium, prov. Namur, Rochefort, RN de la Carrière de Bièrnochamps © Stéphane Claerebout

Planchonia arabidis on Bupleurum falcatum

detail

Planchonia arabidis larva

larva

Planchonia arabidis: scale

mature scale

Eryngiophaga hungarica: gall

Bupleurum falcatum, Belgium, prov Namur, Viroinval, Nismes © Stéphane Claerebout; malformations left behind now the causer has become adult.

gall

scale, attached to the stem in a low depression that is surrounded by a low ridge. Locally the stem is swollen and malformed.

hostplants

polyphagous

Achillea millefolium, setacea; Aegonychon purpurocaeruleum; ?Alchemilla vulgaris; Alyssum montanum; Anthyllis vulneraria; Arabis collina; Bupleurum falcatum; Campanula garganica, glomerata, rapunculoides, rapunculus, trachelium; Capsella bursa-pastoris; Cardamine glauca; Centaurea scabiosa; Chenopodium hybridum; Clinopodium acinos; Cota tinctoria; Echium vulgare; Epilobium palustre, roseum; Eupatorium cannabinum; Euphrasia; Falcaria vulgaris; Fragaria; Gentianella ciliata, germanica; Geranium robertianum; Glaux maritima; Gypsophila fastigiata; Hedera helix; Helianthemum nummularium; Heracleum sphondylium; Hieracium; Holosteum umbellatum; Hylotelephium telephium; Hypericum perforatum, pulchrum; Knautia arvensis; Lactuca serriola, viminea; Leontodon hispidus; Leucanthemum vulgare; Ligustrum vulgare; Linaria; Lithospermum officinale; Lotus corniculatus; Malva thuringiaca; Medicago falcata, lupulina; Melilotus dentatus; Nigella arvensis; Onobrychis arenaria; Pastinca sativa; Picris hieracioides; Pimpinella saxifragae; Pittosporum tobira; Plantago lanceolata; Potentilla argentea, erecta, grandiflora, hirta, recta; Pulsatilla pratensis; Salvia x sylvestris, verticillata; Sanguisorba minor; Scabiosa ochroleuca; Scorzoneroides autumnalis; Scrophularia; Securigera varia; Seseli annuum, libanotis, osseum; Silene viscaria; Sisymbrium altissimum; Stachys officinalis, recta; Teucrium chamaedrys, scorodonia; Thesium humifusum, linophyllon subsp. montanum; Thymus vulgaris; Veronica chamaedrys, officinalis; Vicia disperma, tenuifolia.

synonyms

Asterolecanium arabidis; also A. fimbriatum sensu Buhr, Dauphin & Aniotsbehere at least most of the times, refers to arabidis.

references

Béguinot (2003a), Buhr (1964b,c, 1965a), Dauphin & Aniotsbehere (1997a), Hellrigl (2004a), Malumphy (2009a), Redfern & Shirley (2011a), Schmutterer & Hoffmann (2003a), Tomasi (2012a), Vovlas, Malumphy & Mifsud (2013a).

mod 1.i.2018