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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Beetles (Coleoptera) » Polyphaga » Series Cucujiformia » Curculionoidea » Snout and Bark Beetles (Curculionidae) » Dryophthorinae » Rhynchophorini » Granary Weevils (Sitophilus) » Rice Weevil (Sitophilus oryzae)

Species Sitophilus oryzae - Rice Weevil

Classification · Explanation of Names · Size · Identification · Range · Food · Life Cycle · Remarks · Internet References · Works Cited

Classification

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)

Size

3.0–4.6 mm(1)

Identification

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)

Range

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)

Food

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)

Remarks

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

Contributed by Jim McClarin on 24 November, 2006 - 5:57am
Additional contributions by Beatriz Moisset, v belov
Last updated 3 May, 2014 - 3:14pm

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