Insects Feeding
on these Plants:


Polygonum spp.
(Knotweed) [Polygonaceae]
(Some obervations may be based on Persicaria spp. Observations are from Wagner, Rider, Hottes & Frison, Covell, Smith, Blackman & Eastop, Robinson & Bradley, Majka et al., ScaleNet)

Coleoptera (Beetles)
Curculionidae: Rhinoncus pyrrhopus [this insect is widely distributed; syn. Campylirhynchus pyrrhopus] MAM2007

Heteroptera (True Bugs)
Pentatomidae: Coenus delia Rid2009, Holcostethus limbolarius Rid2009

Homoptera (Sucking Insects)
Aphididae: Abstrusomyzus phloxae [polyphagous] BE2013, Aphis polygonata [found on creeping mats of knotweed; introduced from Eurasia into North America, including Illinois] BE2013, Brachycaudus rumexicolens [found on inflorescences] BE2013, Capitophorus hippophaes (Polygonum Aphid) [found on Eleagnus spp. as primary hosts, migrating during the summer to the leaf undersides of knotweed & smartweed] BE2013 RB1965, Macrosiphum gei (Avens Aphid) [polyphagous] HF1931, Macrosiphum venaefuscae [distributed in E USA] BE2013; Pseudococcidae:
Phenacoccus solani (Solanum Mealybug) [found on lower leaves & roots, polyphagous; this insect has been found in Maryland & Virginia, although it occurs primarily in southern & western USA] SN2014, Pseudococcus dolichomelos (False Trochanter Mealybug) [polyphagous; this insect has been found in NE USA & elsewhere] SN2014, Pseudococcus maritimus (Grape Mealybug) [found on foliage, polyphagous; this insect is widely distributed] SN2014, Pseudococcus sorghiellus (Trochanter Mealybug) [polyphagous; this insect is widely distributed in eastern USA] SN2014

Hymenoptera (Bees, Wasps, & Sawflies)
Tenthredinidae: Ametastegia articulata [larvae feed on foliage, records may refer to Persicaria spp.] Sm2006, Ametastegia glabrata (Dock Sawfly) [larvae feed on foliage, records may refer to Persicaria spp.] Sm2006, Ametastegia recens [larvae feed on foliage, syn. Ametastegia pulchella Rohwer, records may refer to Persicaria spp.] Sm2006

Lepidoptera (Butterflies, Skippers, & Moths)

Arctiidae: Grammia virguncula (Little Virgin Moth) [polyphagous, found in northern IL] Cv2005; Geometridae: Haematopis grataria (Chickweed Geometer) Cv2005, Orthonama centrostrigaria (Bent-Line Carpet) Cv2005, Orthonama obstipata (The Gem) [polyphagous] Cv2005, Timandra amaturaria (Cross-Lined Wave) Wg2005; Noctuidae: Melanchra picta (Zebra Caterpillar) [larvae feed on leaves, polyphagous] Wg2005; Pyralidae: Nomophila nearctica [polyphagous] Cv2005