Biocontrol introduction

Target pest: Listroderes difficilis (Coleoptera: Curculionidae), vegetable weevil

Agent introduced: Stethantyx argentinensis (Hymenoptera: Ichneumonidae)

Imported: 1960, 1962

Import source: Argentina and Uruguay via Australia

Released: 1961

Release details: Approximately 50 adults or cocoons released at Palmerston North, adults released in Dodsons Valley near Nelson and some in DSIR grounds at Nelson

Establishment: Not recovered

References

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.