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Species Popillia japonica - Japanese Beetle

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Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Polyphaga (Water, Rove, Scarab, Long-horned, Leaf and Snout Beetles)
Superfamily Scarabaeoidea (Scarab, Stag and Bess Beetles)
Family Scarabaeidae (Scarab Beetles)
Subfamily Rutelinae (Shining Leaf Chafers)
Tribe Anomalini
Genus Popillia
Species japonica (Japanese Beetle)
Explanation of Names
Popillia japonica Newman 1841
A single (adventive) species in the genus. (1)
3/8 inch (10 mm) long and 1/4 inch (7 mm) wide.
e. N. Amer. and spreading westward (PE-GA-CO) (BG data); found in CA (2005, Santa Clara Co.) (2)
native to E. Asia, introduced in N. Amer. (NJ 1916, with nursery stock)
mostly: Jun-Aug (BG data)
Larvae feed on roots of many plants. Adults feed on foliage, flowers and fruits of various plants. (3)
Life Cycle
Adult females lay eggs in soil June through early fall. Grubs feed on roots until hibernating underground (4-8" deep) as third instar larvae when cool weather comes.
See images at Wikipedia
The original U.S. population was detected in New Jersey in 1916, having been introduced from Japan.
Parasitized by the introduced fly Istocheta aldrichi and wasp Tiphia vernalis, and the native wasp Scolia dubia.
Print References
Potter, D.A. and W. Held. 2002. Biology and Management of the Japanese Beetle. Annual Review of Entomolology 47: 175–205. (Full PDF)
Internet References
Fact sheet - David J. Shetlar and Jennifer E. Andon, Department of Entomology, Ohio State University Extension
Fact Sheet - Erin Hodgson, Department of Entomology, Iowa State University
Fact Sheet - M.F. Potter, D.A. Potter, and L.H. Townsend, Extension Entomologists, University of Kentucky College of Agriculture
Works Cited
1.American Beetles, Volume II: Polyphaga: Scarabaeoidea through Curculionoidea
Arnett, R.H., Jr., M. C. Thomas, P. E. Skelley and J. H. Frank. (eds.). 2002. CRC Press LLC, Boca Raton, FL.
2.California plant pest & disease report, Vol. 22 (Jul 2002 through Jul 2005)
S. Gaimari, ed. 2005. California Department of Food & Agriculture, Plant Pest Diagnostics Branch. 78 pp.
3.Peterson Field Guides: Beetles
Richard E. White. 1983. Houghton Mifflin Company.