Pulvinaria hydrangeae Steinweden, 1946

hydrangea scale

on trees, less often shrubs

Acer campestre, Hungary, Budapest, Hűvösvölgy, 9.viii.2019 © László Érsek

female with beginning ovisac

ovisacs

larvae

larva, dorsal view

Acer campestre, female with ovisac

Tilia, females with ovisac (from van der Linden, 2007a)

parasite

Scales mainly at the underside of leaves. The ovisac, up to 10 mm in length, is formed in the months of June-August and is elongated with three clear furrows. Often a female drops off after the eggs have been deposited, leaving only the ovisac on the leaf. Univoltine; hibernation as larva on the young branches.

host plants

polyphagous

Acer campestre, monspessulanum, negundo, palmatum, platanoides, pseudoplatanus; Actinidia chinensis; Aesculus x carnea, hippocastanum, pavia; Amelanchier lamarckii; Aralia elata; Carpinus betulus; Castanea sativa; Catalpa bignonioides; Celastrus; Cornus mas; Corylus colurna; Diospyros kaki; Fagus sylvatica; Fraxinus excelsior; Hydrangea macrophylla; Lonicera; Magnolia; Malus floribunda; Morus; Phellodendron; Photinia bodinieri; Platanus; Populus; Prunus serrulata, x gondouinii; Pterocarya; Pyracantha coccinea; Pyrus calleryana; Quercus robur; Rhus typhina; Rosa rugosa; Salix caprea; Sorbus aria, aucuparia, intermedia; Styphnolobium japonicum; Taxus baccata; Tilia americana, cordata, x euchlora, x europaea, platyphyllos, tomentosa; Ulmus; Viburnum opulus; Zelkova serrata.

Preferably on Hydrangea.

distribution within Europe

(PESI, 2018).

synonyms

Eupulvinaria hydrangeae.

references

Gertsson (2016a), Jansen (1999b, 2000a, 2013a), van der Linden (2007a), Malumphy (2010a), Masten Milek, Ivezić & Šimala (2009a), Salisbury & Malumphy (2017a), Schmutterer & Hoffmann (2003a), Schneider & Tanson (2003a), Seljak (2008a, 2010a).