Target pest: Mythimna separata (Lepidoptera: Noctuidae), cosmopolitan armyworm
Agent introduced: Apanteles ruficrus (Hymenoptera: Braconidae) = Cotesia ruficrus (Haliday)
Imported: Naturally occurring 1970-71
Import source: Naturally occurring in New Zealand but a different strain was imported from Pakistan
Release details: Approximately 4,000 mass-parasitised larvae and 40,000 adults were released from Huntly north in the North Island and near Nelson in the South Island.
Establishment: Established 1971
Impacts on target: Credited with reducing the economic impact of M. separata.
Impacts on non-targets: Consistently parasitises 5-10% of Agrotis ipsilon in early summer while parasitism of Chrysodeixis eriosoma varies, 40% has been recorded but generally lower levels prevail.
Cameron PJ, Hill RL, Bain J and 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.