Bruchus pisorum

Bruchus pisorum, known generally as pea weevil, is a species of leaf beetle in the family Chrysomelidae.

The genus Bruchus was originally placed within the family Curculionidae (weevils) because of elongated facial parts and four segmental tarsi.

The seed-beetles were later separated into their own family by Spinola (1843),[4] and Lacordaire (1845) reinforced the position of Bruchidae within the superfamily Chrysomeloidea.

[5] Its ability to survive in the dry pea seed for an extended time has led to it being transported to other regions rather than through migrating naturally, such that it is now considered cosmopolitan.

Also, a survey found the pea weevil in south-eastern Europe and the Middle East including, Bulgaria, Yugoslavia, Albania, Greece, Turkey, Syria, Lebanon, Israel, Iran and Afghanistan (Borowiec 1987b).

In South Australia, adult weevils leave their overwintering sites and arrive in pea crops in early Spring.

[13] This was confirmed by Annis and Okeeffe (1984a)[14] who found no difference in survival of larvae placed in green pods of P. sativum and L. saivus.

[16] Ovaries of weevil have been shown to mature when the adult feeds on pollen of species other than that of cultivated pea (Annis and Okeeffe 1984b).

Pea weevil, Bruchus pisorum