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Acanthoscelides obtectus (Say)
Common Bean Weevil




Appearance:

The weevel is 3-5 mm long, yellow-green to olive, mottled with darker brown and grey; the end of the abdomen is yellow-red. The grub-like white larvae are hairy and grow to a length of up to 4 mm.


Life History:

The female lays an average of 40-50 eggs loosely between the beans; in hot countries, also in the ripening pods in the field. The larva develops in the bean; several can develop in one bean. Before pupation, the larva prepares a circular exit hole which remains covered only by the skin of the seed ("window").


Distribution:

In most warm countries. In the temperate zones mainly in stores.


Damage:

Attacks all pulses, particularly beans. Can reproduce repeatedly in dried pulses in store.

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