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Insects Feeding
on this Plant:

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Silphium perfoliatum
(Cup Plant) [Asteraceae]
(observations are from Knight, Clark et al., Hottes & Frison, Henderson & Sauer, Marcovitch, Miller, Pepper, Charlet & Gavloski, Lisberg & Young, Natural History Museum)

Coleoptera (Beetles)
Chrysomelidae: Microrhopala laetula Clk2004, Microrhopala vittata (Goldenrod Leaf-Miner) [larvae mine leaves] Mar1916; Curculionidae: Smicronyx sordidus (Gray Sunflower Seed Weevil) [larvae feed on seeds] CG2011; Mordellidae: Mordellistena convicta [larvae bore through stems] LY2003

Heteroptera (True Bugs)

Miridae: Slaterocoris hirtus Kn1941

Homoptera (Sucking Insects)
Aphididae: Uroleucon ambrosiae (Brown Ambrosia Aphid) [possible misidentification of aphid] Pp1965, Uroleucon rudbeckiae (Golden Glow Aphid) [possible misidentification of aphid] HF1931

Hymenoptera (Bees, Wasps, & Sawflies)
Cynipidae: Antistrophus jeanae [larvae live in stems] HS2010, Antistrophus silphii [larvae form large globoid galls on stems] HS2010

Lepidoptera (Butterflies, Skippers, & Moths)
Noctuidae: Papaipema silphii (Silphium Borer Moth) [larvae bore through stems & roots] NHM2010; Tortricidae: Eucosma giganteana (Giant Eucosma) [larvae feed on terminal growth, including buds & flowerheads, and they may later bore into stems or roots] Mlr1987 NHM2010
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