Target pest: Lepidosaphes ulmi (Hemiptera: Diaspididae), armoured scales
Agent introduced: Hemisarcoptes malus (Astigmata: Hemisarcoptidae)
Import source: Nova Scotia
Release details: Released at several sites.
Establishment: Established at several sites but never became abundant and there is no evidence of spread from the release sites.
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.