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Biocontrol introduction

Target pest: Pieris rapae (Lepidoptera: Pieridae), cabbage white butterfly

Agent introduced: Cotesia glomerata (Hymenoptera: Braconidae) = Apanteles glomeratus (L.)

Imported: 1931-34, 1938-39

Import source: 1931-34 Imperial Institute of Entomology, England. 1938-39 Bureau of Entomology, Washington, USA.

Import notes: Introduced as Apanteles glomeratus (L.)

Released: 1931-1945

Release details: In 1931-34, 250,000 adults were liberated in North Island. In 1938-39, 2,317 adults were released near Nelson. Released at an unspecified site during 1943-44, in Hawkes Bay in 1944-45(numbers unknown), Palmerston North (700 adults) in 1960 and possibly there were others. Released in 1954-55 on Chatham Island.

Establishment: Recovered from Nelson in 1938-39 and well established by 1943-44. Recorded in canterbury in 1946-47. Recovered from southern North Island in 1959 and in Auckland in 1973.

Impacts on target: Cotesia glomeratus, Pteromalus puparum, a granulosis virus and predation in combination have a major impact on P. rapae.

References

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.