Planchonia arabidis Signoret, 1876
pittosporum pit scale
on all sorts of plants
Hedera helix (cultivar), Hongarije, Mosonmagyaróvár, mid-May © László Érsek
gall
note the discrepancy between the size of the galling and the size of the young scale.
mid-August
the entire plant is severely damaged
the full-grown scale
Hedera helix, France, Corsica, Feliceto, Mare e Monti © Stéphane Claerebout
damage
also leaves become disfigured
the scale
© Raymond Gill, California Department of Food and Agriculture
Bupleurum falcatum, Belgium, prov. Namur, Rochefort, RN de la Carrière de Bièrnochamps © Stéphane Claerebout
detail
larva
mature scale
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 massalongianum Targioni Tozzetti 1893; 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), Houard (1908a, 1909a [“massalongoianum”]), Malumphy (2009a), Redfern & Shirley (2011a), Schmutterer & Hoffmann (2003a), Tomasi (2012a), Vovlas, Malumphy & Mifsud (2013a).