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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Beetles (Coleoptera) » Polyphaga » Series Cucujiformia » Longhorn and Leaf Beetles (Chrysomeloidea) » Leaf Beetles (Chrysomelidae) » Eumolpinae » Adoxini » Bromius » Western Grape Rootworm (Bromius obscurus)

Species Bromius obscurus - Western Grape Rootworm

Classification · Explanation of Names · Size · Range · Season · Food · Life Cycle · Remarks · Works Cited
Beetle - Bromius obscurus Western Grape Rootworm - Bromius obscurus This one got away - Bromius obscurus Bromius obscurus Belden Day Netting - Bromius obscurus fuzzy black beetle - Bromius obscurus Oval Leaf Beetle - Bromius obscurus Unknown Beetle - Bromius obscurus
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Polyphaga
No Taxon (Series Cucujiformia)
Superfamily Chrysomeloidea (Longhorn and Leaf Beetles)
Family Chrysomelidae (Leaf Beetles)
Subfamily Eumolpinae
Tribe Adoxini
Genus Bromius
Species obscurus (Western Grape Rootworm)
Explanation of Names
Bromius obscurus (Linnaeus 1758)
Size
Adult: 4mm,
larva: 7mm.
Range
Holarctic: Europe, Asia, North America - Map (1), mostly northern NA
Season
May-Aug (BG data)
Food
Usually fireweed (Chamerion angustifolium) and willowherb (Epilobium hirsutum), but also Virginia creeper (Parthenocissus) and grape (Vitis). (2)

Larvae feed externally on roots while adults chew long, linear cuts in leaves.(3)
Life Cycle
North American populations reproduce sexually while European populations are pathenogenetic.(3)
Remarks
Can be a pest on grapes (Vitis). Practical importance probably low, because the species
usually is rare to absent in regions where grapes are cultivated (true also in Eurasia)
Works Cited
1.Global Biodiversity Information Facility (GBIF)
2.Host plants of leaf beetle species occurring in the United States and Canada
Clark et al. 2004. Coleopterists Society, Special Publication no. 2, 476 pp.
3.Beetles of Eastern North America
Arthur V. Evans. 2014. Princeton University Press.
Contributed by Boris Büche on 15 August, 2007 - 5:21am
Additional contributions by Beatriz Moisset, Lynette Elliott, Bbarnd, Mike Quinn, Marci Hess
Last updated 18 September, 2022 - 10:33am

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