Target pest: Coleophora frischella (Lepidoptera: Coleophoridae) = Coleophora trifolii, white tipped clover casebearer
Agent introduced: Chrysonotomyia trifolii (Hymenoptera: Eulophidae)
Imported: 1961, 1962, 1967, 1968,1969
Import source: 1961,69 near Freiburg, Germany, 1961,62,68,69 Avignon, France all via Delémont, Switzerland
Released: 1967, 1968
Release details: In 1968 1,600 adults were released at Palmerston North. It may have been released in 1969 but numbers and location are unknown
Establishment: Establishment was confirmed at Lincoln in 1977. Established throughout Canterbury and Manawatu by 1982.
Impacts on target: Up to 50% parasitism of Coleophora frischella recorded in Canterbury and 10% in Manawatu.
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.