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Insects Feeding
on this Plant
:
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Conyza canadensis
(Horseweed) [Asteraceae]
(observations are from Thomas, Knight, Hottes & Frison, Wagner, Covell, Aldrich & Osten-Sacken, Stireman et al., Felt, Gangwere, Joern, Pepper, Robinson & Bradley, Spencer & Steyskal, Snodgrass et al., Ford & Jackman, Natural History Museum)

Coleoptera (Beetles)
Mordellidae: Mordellistena pustulata [larvae bore through stems] FJ1996

Diptera (Flies)
Agromyzidae: Amauromyza maculosa [larvae are blotch leaf-miners; widespread] SS1986, Calycomyza humeralis (Aster Leafminer) [larvae are blotch leaf-miners; widespread] SS1986, Calycomyza platyptera [larvae are leaf-miners; found in Maryland & Mississippi] SS1986; Cecidomyiidae: Asteromyia modesta (Horseweed Blister Midge) [larvae form inconspicuous blister mines on leaves] Flt1917 Str2010, Neolasioptera erigerontis (Horseweed Stem Gall Midge) [larvae form fusiform galls on stems] AOS1905 Flt1917

Heteroptera (True Bugs)
Miridae: Lygus lineolaris (Tarnished Plant Bug) [a preferred host plant] SSS1984, Polymerus basalis (Red-spotted Aster Mirid) SSS1984, Taylorilygus apicalis (Broken-backed Bug) [a preferred host plant, syn. Taylorilygus pallidulus] Kn1941 SSS1984

Homoptera (Sucking Insects)
Aphididae: Prociphilus erigeronensis HF1931, Uroleucon erigeronense [found on flowering stalks, observed in Illinois; syn. Uroleucon erigeronensis] HF1931 Th1877 RB1965, Uroleucon gravicorne Pp1965 


Lepidoptera (Butterflies, Skippers, & Moths)
Geometridae: Eupithecia miserulata (Common Pug) [larvae feed on flowers] NHM2010, Synchlora aerata (Wavy-lined Emerald) [larvae feed on flowers] NHM2010; Noctuidae: Ctenoplusia oxygramma (Sharp-stigma Looper Moth) [syn. Agrapha oxygramma] Cv2005 NHM2010, Cucullia florea (Unrusted Paint) [larvae feed on flowers] NHM2010, Cucullia speyeri (Speyer's Paint) [larvae feed on flowers] Wg2005 NHM2010, Peridroma saucia (Variegated Cutworm) [polyphagous] NHM2010, Schinia arcigera (Arcigera Flower Moth) [larvae feed on flowers] Wg2005, Spodoptera ornithogalli (Yellow-striped Armyworm) [polyphagous] NHM2010; Nymphalidae: Chlosyne nycteis (Silvery Checkerspot) NHM2010

Orthoptera (Grasshoppers)
Acrididae: Melanoplus differentialis (Differential Grasshopper) Jor1985; Oecanthidae: Oecanthus quadripunctatus (Four-spotted Tree Cricket) [feeds on seedheads] Ggw1961
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