Natural enemies of the bee genus Ceratina (Hymenoptera: Apidae) in the Niagara region, Ontario, Canada.

摘要

Ceratina dupla and C. calcarata (Hymenoptera: Apidae) are abundant bees in southern Ontario, commonly nesting in staghorn sumac (Rhus typhina), wild raspberry (Rubus strigosus) and teasel (Dipsacus fullonum). Ceratina nests were collected from April-September 2008 and parasitized individuals were reared to adulthood in the laboratory. Pyemotes sp. (Pyemotidae) and Baryscapus americana (Eulophidae) were the most common natural enemies, followed by Baryscapus sp., Axima zabriskiei, and Hoplocryptus zoesmairi. Eupelmus vesicularis, Coelopencyrtus sp. and Eurytoma sp. near apiculae were rarely collected. This is the first record of E. vesicularis (Eupelmidae) as a primary host on any member of the family Apidae. New host records are also reported for H. zoesmairi (Ichneumonidae), two different Baryscapus spp. (Eulophidae), Eurytoma sp. near apiculae (Eurytomidae) and Pyemotes sp. (Pyemotidae) on C. calcarata and C. dupla. Detailed descriptions of immature development of the parasitoids, and their preferences for host bee species and host plant species are provided.