Target pest: Pseudococcus viburni (Hemiptera: Pseudococcidae) = Pseudococcus affinis, Pseudococcus obscurus, obscure mealybug
Agent introduced: Tetracnemoidea brevicornis (Hymenoptera: Encyrtidae) = Tetracnemus pretiosus
Australia via California, USA
Cameron et al. (1989) - in December 1928, a consignment of T. brevicornis was sent to the Cawthorn Institute in Nelson from California, USA, originating from material collected in Australia between August 1927 and February 1928. There were no releases from this consignment and by October 1929 all had died.
Cameron et al. (1989) - not released.
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.