Target pest: Coleophora frischella (Lepidoptera: Coleophoridae) = Coleophora trifolii, white tipped clover casebearer
Agent introduced: Scambus brevicornis (Hymenoptera: Ichneumonidae) = Ephialtes brevicornis
Near MontmÃ©dy, France
Cameron et al. (1989) - Scambus brevicornis was imported in August 1952 as parasitised Coleophora trifolii host larvae collected near MontmÃ©dy, France. No hosts were available for emerging wasps and hibernating Coleophora spp. larvae were collected from the field for them. These were included in the unemerged material [presumably along with originally imported C. trifolii - in all several hundred host larval cases, presumably including S. brevicornis-parasitised individuals] placed in the field in March 1953. From a 1955 importation of 5,000 parasitised C. trifolii from MontmÃ©dy, seven female and six male S. brevicornis emerged; some of these were used to initiate a laboratory colony on Plutella xylostella, but there were no releases from this importation.
Cameron et al. (1989) - in March 1953 several hundred parasitised Coleophora spp. [apparently a mix of locally-collected Coleophora spp. and imported C. trifolii - see Cameron et al. (1989) entry in the 'Import notes' section] containing S. brevicornis (amongst other species) were released, probably near Nelson.
Cameron et al. (1989) - there have been no recoveries of S. brevicornis.
Cameron PJ, Hill RL, Bain J, Thomas WP (1989). A Review of Biological Control of Invertebrate Pests and Weeds in New Zealand 1874-1987. Technical Communication No 10. CAB International Institute of Biological Control. DSIR Entomology Division. 424p.