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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Life cycle of obtectux generation takes days. Search Details Australian Biosecurity. Chemical Control Due to the variable regulations around de- registration of pesticides, we are for the moment not including any specific chemical control recommendations. The native land of this species is Central America.

This limits the species to how far north it can spread, and is found only as far north as northern Lithuaniawith acanthosceldies being found in south-west Siberia. Retrieved 3 February Management of bean weevils with insecticides.

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The species is very sensitive to temperatures below zero. Dark brown short elytra do not cover abdominal end. Higher and lower temperatures cause a decrease of fecundity. Biological Control Biological control has not been used against this species.

It has been recorded on a number of other legumes, including acanthoscelidea in Mexico, chickpeas and Voandzeia subterranea, but it seldom attains pest status on these hosts. Adult bean weevils hibernate inside the seeds or seed pods of these plants. High harming activity is reported in Transcaucasia, Krasnodar Territory, in some regions of Ukraine. Biological features of bean weevil Acanthoscelides obtectus Say in Georgia.


Eggs are milky white. Good store hygiene plays an important role in limiting infestation by this species.

AgroAtlas – Pests – Acanthoscelides obtectus Say – Bean Weevil

Cultural Control and Sanitary Methods Good store hygiene plays an important role in limiting infestation by this species. Bean weevils develop and feed upon leguminous plants. Eleytra does not cover the abdominal end. The grub, or larva, is whitish and hairy. Class Acanthosceliees, order Coleoptera, family Bruchidae, genus Acanthoscelides.

Go to distribution map EU pesticides database www. White pupa is about 4 mm in length.

Pupation also takes place in grain days. Originating in Central America they have been inadvertently spread around the world in grain shipments.

Page Through Results Previous acanthosceoides 2 Next. By using this site, you agree to the Terms of Use and Privacy Policy. Oligophagous pest of leguminous. The eggs are whitish and ellipsoidal, and are laid in loose groups in the holes chewed in the pod along the seam or in cracks. The Bean Weevil causes significant damage to haricot-bean and bean.

The removal of infested residues from last season’s harvest is essential. The pest also migrates to grain fields. Ecological features of bean weevil and basis for control measures.

bean bruchid (Acanthoscelides obtectus)

The largest number and harming activity acanthoscelies observed at the end of June and in July. Within the territory of the Former Soviet Union, the insect is marked with spotted distribution.

Proceedings of Stavropol’ agricultural institute. Proceedings of Georgian plant protection institute, In some days after coupling, female lay eggs into or on ripening pods by groupspiercing the pod sutures or gnawing holes.


This is to ensure that we give you the best experience possible. Archived from the original on 3 February The pest arrives in the storehouse with grain where it develops until cold.

In southern acanthoscelodes of the species area, the overwintering can be observed in plant residues. They are generally considered a pest species for this reason. The insect has clavate antenna first segments are red-brown and yellow-red legs.

Biologicheskii zhurnal Armenii 36 8: For further information, we recommend you visit the following resources: The eggs develop during days. Acanthoscelides obtectus Scientific classification Kingdom: When small lots of beans are stored, daily turning of the storage container can significantly reduce infestation.

The insect produces a sweet, “fruity” pheromone that gives cultures of newly emerged adults a pleasant smell. The bean weevil is a significant pest in some parts of the world, especially in areas such as Australia where it is non-native.

The northern border of its area goes along northern borders of Lithuania, Byelorussia, Tula and Ryazan’ Regions, Bashkortostan, Tatarstan. Larval period lasts 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. When grain pulses are stored at farm level the admixture of vegetable oil can give good protection Baier and Webster,