Pests. Acanthoscelides obtectus Say – Bean Weevil. Object map. Systematic position. Class Insecta, order Coleoptera, family Bruchidae, genus Acanthoscelides. Size: mm. Basic colour: Brown Pattern colour: Darker spots scattered, sometimes paler longitudinal streaks. Number of spots: Numerous small dark spots. Citation: Walker, K. () Bean weevil (Acanthoscelides obtectus) Updated on 1 /25/ AM Available online: PaDIL.

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Bean weevil

The beetle body is ovoid, slightly convex, light or dark brown, with yellow-green golden hairs and longitudinal spots from above, light gray hairs from below. Ecological features of bean weevil and basis for control measures. Larvae penetrate into the grains, eating the contents completely.

Biological features of bean weevil Acanthoscelides obtectus Say in Georgia. In some days after coupling, female lay eggs into or on ripening pods by groupspiercing the pod sutures or gnawing holes.

Life cycle of one generation takes days. In southern part of the species area, the overwintering can be observed in plant residues.

Pronotum is wider than it is long; quadrangular scutellum obtecus large. For further information, we recommend you visit the following resources: Sometimes it is observed in the southern part of West Siberia. The grub, or larva, is whitish and hairy. Bruchids pea and bean weevils Callosobruchus chinensisC. If the seeds are stored in a warm place multiple generations can be produced one after another.


AgroAtlas – Pests – Acanthoscelides obtectus Say – Bean Weevil

Biological Control Biological control has not been used against this species. New pest of haricot-bean Acanthoscelides obtectus Say in Stavropol’ area. Proceedings of Sixth Session of Transcaucasian Board to coordination research works on plant protection November, Its length varies from 2 to 5 mm. Fecundity of one female reaches eggs. By using this site, you agree to the Terms of Use and Privacy Policy. It has been recorded on a number of other legumes, including cowpeas in Mexico, chickpeas and Voandzeia subterranea, but it seldom attains pest status on these hosts.

More Information Author Walker, K. Retrieved 3 February It was transferred with grain to Europe in the end of Nineteenth century; in the s it was brought to Crimea. Most important predators are Eupelmus degeeri Dalm.

Pupation also takes place in grain days. When small lots of beans are stored, daily turning of the storage container can significantly reduce infestation. Zashchita rastenii ot vreditelei i boleznei 2: This page was last edited on 22 Marchat The species was described in by Thomas Say. EU pesticides database www.


Go to distribution map Related Species Lesser pea weevil – [Bruchus affinis] Pea weevil – [Bruchus pisorum] Broadbean weevil – [Bruchus rufimanus] Graham bean weevil – [Callosobruchus analis] Southern Cowpea weevil – [Callosobruchus chinensis] Cowpea weevil – [Callosobruchus maculatus] Cowpea Weevil – [Callosobruchus phaseoli].

Grey-green in colour and about 3 – 5 mm long.

bean bruchid (Acanthoscelides obtectus)

Proceedings of Georgian plant acanthoscelifes institute, The beetles appear at the temperature The native land of this species is Central America. Higher and lower temperatures cause a decrease of fecundity.

Acanthoscelides obtectusthe bean weevilis a species of beetle.

In storehouses, the pest occurs in more northern territory. Eleytra does not cover the abdominal end.