THE DISPERSAL OF THE INTRODUCED PARASITE LOPHYROPLECTUS LUTEATOR (HYMENOPTERA: ICHNEUMONIDAE) FOLLOWING ITS RELEASE AGAINST NEODIPRION SERTIFER (HYMENOPTERA: DIPRIONIDAE) IN ONTARIO

Lophyroplectus luteator (Thunb.), a European ichneumonid, has been established as a parasite of Neodiprion sertifer (Geoff.) from a release made in 1962, and has dispersed approximately 12 miles (19.3 km) in the 7 years following introduction. A second, smaller release in the same year failed. In a third release, made in 1964, recoveries were made every year until sampling was stopped in 1971, but dispersal has only been approximately 2 miles (3.2 km).