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Species Sitophilus oryzae - Rice Weevil

Coleoptera - Sitophilus oryzae Coleoptera - Sitophilus oryzae Sitophilus oryzae Sitophilus oryzae Grain weevil? - Sitophilus oryzae Rice Weevil - Sitophilus oryzae Sitophilus oryzae Sitophilus oryzae
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Polyphaga
No Taxon (Series Cucujiformia)
Superfamily Curculionoidea
Family Curculionidae (Snout and Bark Beetles)
Subfamily Dryophthorinae
Tribe Rhynchophorini
Genus Sitophilus (Granary Weevils)
Species oryzae (Rice Weevil)
Explanation of Names
Sitophilus oryzae (Linnaeus 1763)
3.0–4.6 mm(1)
similar to S. granarius but able to fly and has 4 paler spots on the elytra; all but impossible to tell apart from, and often confused with, S. zeamais (only male genitalia provide reliable diagnostic features), although tends to be smaller and paler(2); the two may form mixed infestations(3)
native to tropical Asia(4), adventive elsewhere and now cosmopolitan in warm temperate, subtropical, and tropical regions; common across NA, established in Canada (unlike S. zeamais)(2)
beans, nuts, wide variety of grains (with preference for wheat), even fruit; the adults also eat flour(1)(2)
Life Cycle
Female lays an average of 4 eggs per day and may live up to 5 months; more details in(1)
Serious stored grains pest worldwide; adults can fly to nearby cereal fields and cause preharvest problems(2)
Internet References
Fact sheet (Koehler 1994-2012)(5)
Works Cited
1.Handbook of urban insects and arachnids: A handbook of urban entomology
Robinson W.H. 2005. Cambridge University Press.
2.Beetles associated with stored products in Canada: An identification guide
Bousquet Y. 1990. Research Branch Agriculture Canada, Publication 1837.
3.Insect and Mite Pests in Food, an Illustrated Key
J. Richard Gorham, editor. 1991. United States Department of Agriculture Handbook 655.
4.Alien terrestrial arthropods of Europe
Roques A., Kenis M., Lees D., Lopez-Vaamonde C., Rabitsch W., Rasplus J.-Y., Roy D., eds. 2010. BioRisk 4 Special Issue; 2 vols., 1028 pp.
5.EDIS -- Electronic Data Information Source of UF/IFAS Extension