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Biocontrol introduction

Target pest: Lepidosaphes ulmi (Hemiptera: Diaspididae), armoured scales

Agent introduced: Hemisarcoptes malus (Astigmata: Hemisarcoptidae)

Imported: 1968

Import source: Nova Scotia

Released: 1968

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.