Flower-Visiting Insects
of Japanese Knotweed
Reynoutria japonica (Japanese Knotweed) introduced
(Scientific synonyms of this plant are Polygonum cuspidatum and Fallopia japonica. Bees suck nectar or collect pollen, flies & beetles suck nectar or feed on pollen, wasps suck nectar, ants suck nectar from extra-floral nectaries. Observations are from Williams and Johnson et al.)
Bees (long-tongued)
Apidae (Apinae): Apis mellifera (JBD); Apidae (Bombini): Bombus bimaculatus (JBD), Bombus impatiens (JBD)
Wasps
Tiphiidae: Methocha stygia [exfl sn] (JBD); Sphecidae (Sphecinae): Sceliphron caementarium sn (JBD); Vespidae: Vespula maculifrons sn (JBD); Vespidae (Polistinae): Polistes sp. sn (JBD), Polistes dominula sn (JBD), Polistes dorsalis sn (JBD), Polistes fuscatus sn (JBD)
Ants
Formicidae: Camponotus nearcticus [exfl sn] (JBD), Camponotus novaeboracensis [exfl sn fq] (JBD), Camponotus pennsylvanicus [exfl sn] (JBD), Formica argentea [exfl sn] (JBD), Formica subintegra [exfl sn] (JBD), Formica subsericea sn [exfl sn fq] (JBD)
Flies
Syrphidae: Toxomerus spp. (JBD); Calliphoridae: Lucilia coeruleiviridis (JBD); Sarcophagidae: Unidentified spp. (JBD)
Beetles
Cantharidae: Chauliognathus pennsylvanicus (Wms); Scarabaeidae: Popillia japonica (JBD)