Target pest: Cydia pomonella (Lepidoptera: Tortricidae), codling moth
Agent introduced: Mastrus carpocapsae (Hymenoptera: Ichneumonidae)
Cameron et al. (1989) - a consignment of M. carpocapsae (as Aenoplex carpocapsae) (54 adults, 67 larvae, 51 pupae) was imported from Canada in March 1943. By March 1944, 80 adults had been reared.
Cameron et al. (1989) - at least some of the 80 adults reared (see 'Import notes' section) were released, presumably in, or close to, Nelson.
Cameron et al. (1989) - no recoveries were made.
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.