Target pest: Hyperomyzus lactucae (Homoptera: Aphididae), Sowthistle Aphid
Agent introduced: Aphidius sonchi (Hymenoptera: Braconidae)
Import source: SE Australia
Release details: Released onto sowthistle in blackcurrant crops at several sites in North and South Islands
Establishment: Found in November 1994 in Bay of Plenty and Marlborough where it hadn't been released suggesting it was present before releases took place. Appears to have established from the releases.
Stufkens MW and Farrell JA. (1994). Quarantine host range tests on two exotic parasitoids imported for aphid control. Proc. 47th New Zealand Plant Protection Conf. :149-153
Stufkens, MW and Farrell, JA. (1995). Release and establishment of Aphidius sonchi, a parasitoid of the sow thistle aphid in New Zealand proc. 48th New Zealand Plant Protection Conf. 343-344