Target pest: Costelytra zealandica (Coleoptera: Scarabaeidae), grass grub
Agent introduced: Microphthalma michiganensis (Diptera: Tachinidae)
Import source: Canada
Release details: 106 adult tachinids released near Wellington and in Canterbury
Establishment: No recoveries recorded.
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.