Insects Feeding
on this Plant

Cydonia oblonga
(Common Quince) [Rosaceae]
(Observations are from Funkhouser, Knight, Covell, Blackman & Eastop, Watson, Majka et al., Cranshaw, ScaleNet)

Coleoptera (Beetles)
Cerambycidae: Saperda candida (Round-headed Appletree Borer) Crw2004; Curculionidae: Conotrachelus nenuphar (Plum Curculio) [feeds on fruits] Crw2004, Rhynchaenus pallicornis (Apple Flea Weevil) [larvae are leaf-miners] Crw2004; Scolytidae: Scolytus rugulosus (Shothole Borer) [this Eurasian insect is widely distributed in North America] MAM2007

Heteroptera (True Bugs)
Miridae: Lygidea mendax (Apple Red Bug) Kn1941, Lygus lineolaris (Tarnished Plant Bug) Wat1928; Tingidae: Corythucha cydoniae (Hawthorn Lace Bug) Crw2004

Homoptera (Sucking Insects)
Aphididae: Aphis pomi (Green Apple Aphid) [found on young growth] Crw2004, Nearctaphis bakeri (Short-beaked Clover Aphid) [found on young leaves & flower buds of hawthorns & other shrubs in the Rosaceae, migrating during the summer to herbaceous plants in the Fabaceae & other plant families; widely distributed in North America, including Illinois] BE2013 Crw2004, Rhopalosiphum oxyacanthae (Apple-Grass Aphid) [curls young leaves of various trees & shrubs in the Rosaceae, migrating during the summer to the roots of various grasses; found in north-central & NE USA, including Illinois] BE2013; Diaspididae: 
Diaspidiotus ancylis (Putnam Scale) [found on leaves, sometimes bark, polyphagous; this insect is widely distributed in the USA] SN2014, Diaspidiotus forbesi (Forbe's Scale) [found on bark, polyphagous; this insect occurs in north-central USA & elsewhere] SN2014, Diaspidiotus perniciosus (San Jose Scale) [usually found on bark, polyphagous, although preferring woody species in the Rosaceae; this insect is widely distributed; syn. Comstockaspis perniciosa, syn. Quadraspidiotus perniciosus] SN2014, Lopholeucaspis japonica (Japanese Maple Scale) [causes dieback of branches, polyphagous; this insect is found mostly in NE USA, it was introduced from E Asia] SN2014, Pseudaulacaspis pentagona (White Peach Scale) [polyphagous; this insect is found mostly in E USA, it was introduced from Eurasia] SN2014; Membracidae: Glossonotus crataegi Fnk1917; Pseudococcidae: Pseudococcus comstocki (Comstock Mealybug) [found on foliage, including lower side of leaves; polyphagous, feeding on woody vegetation; this insect is widely distributed in NE & north-central USA, it is also found in Ontario] SN2014

Lepidoptera (Butterflies, Skippers, & Moths)
Tortricidae: Cydia pomonella (Codling Moth) [intro. into N. America from Eurasia, larvae feed on fruits] Cv2005