Study on the biology of Abia sericea (L.) (Hymenoptera: Cimbicidae) - a candidate for biological control of teasel (Dipsacus spp.).
The cimbicid sawfly, Abia sericea, belongs to the poorly studied family, Cimbicidae (Hymenoptera: Symphyta). Previous experiments showed that the species' diet is restricted to family Dipsacaceae, thus the cimbicid sawfly is a potential candidate for the biological control of the invasive teasel (Dipsacus spp.). The biology of the cimbicid sawfly was studied under laboratory conditions at the Agricultural University, Plovdiv in 2005-06. The average duration of the egg, larval and pupal stage was 4.3, 23.6 and 20.3 days, respectively. The adult females lived 4.4 days and laid an average of 58.5 eggs during that period. The eggs were laid under the upper or lower epidermis along the periphery of the leaf. The sawfly pupates in double wall cocoon under the food plant among soil particles or dry leaves.