New Host Records and Developmental Notes on the Pear Slug \u3ci\u3eCaliroa Cerasi\u3c/i\u3e (Hymenoptera: Tenthredinidae), Feeding on \u3ci\u3eCotoneaster\u3c/i\u3e and \u3ci\u3eChaenomeles\u3c/i\u3e Species.

Abstract

The pear slug. Caliroa cerasi was collected and reared to adulthood on flowering quince and three species of Cotoneaster. This is the first record of C. cerasi attacking any member of the genus Chaenomeles and the first confirmation of feeding on Cotoneaster in North America. Adult emergence, oviposition, and larval development were evaluated under both laboratory and field conditions. Females lay an average of 48 eggs, with about two-thirds of the oviposition occurring during their first 24 hours. A method for monitoring adult emergence in the field was developed