16 Species recorded by host Acer Campestre Field Maple Eriophyes macrochelus Eriophyes macrorhynchus Acer pseudoplatanus Sycamore Aceria pseudoplatani Eriophyes macrorhynchus Carpinus betulus Hornbeam Eriophyes tenellus Taphrina carpini Chamaenerion angustifolium Rosebay Willowherb Dasineura kiefferiana Cirsium arvense Creeping thistle Urophora cardui Chenopodium album Fat hen Hayhurstia atriplicis Craetagus monogyna Hawthorn Eriophyes goniothorax Fagus sylvatica Beech Eriophyes nervisequus Eriophyes stenaspis Hartigiola annulipes Fraxinus excelsior Ash Eriophyes fraxinivora Nectria galigena Psyllopsis fraxini Ilex aquifolium Holly Phytomyza ilicis Malus sp. Apple Podosphaera leucotricha Potentilla erecta Tormentil Xestophanes brevitarsis Brian Spooner and Jerry Bowdrey Pteridium aquilinum Bracken Chirosia parvicornis Dasineura filicina Quercus robur Pedunculate oak Andricus anthracinus Andricus curvator Andricus fecundator Andricus inflator form globuli Andricus kollari Andricus lignicola Andricus quercuscalicis Biorrhiza pallida Cynips agama Cynips longiventris Cynips quercus-folii Macrodiplosis dryobia Neuroterus albipes Neuroterus numismalis Neuroterus quercusbaccarum Rosa arvensis Field rose Agrobacterium tumefaciens Blennocampa pusilla Sphaerotheca pannosa Rubus fruticosus agg. Blackberry Dasineura plicatrix Salix cinerea Sallow Iteomyia capreae Phyllocolpa ?leucasis Pontania bridgmanni Salix fragilis Crack willow Pontania proxima Sambucus nigra Elder Epitrimerus trilobus Tilia x europaea Lime Eriophyes leiosoma Ulmus sp. Elm Eriophyes ulmi Urtica dioica Stinging nettle Dasineura urticae