Pittosporum psyllid Trioza vitreoradiata (Hemiptera: Triozidae) expanding distribution and host range in the UK.

The pittosporum psyllid Trioza vitreoradiata (Maskell) (Hemiptera: Triozidae), an insect native to New Zealand, became established in south west England in 1993. It has since spread to many regions where its host plants (Pittosporum spp.) can be grown in England, Scotland and the Republic of Ireland. It has been recorded feeding on eight species of Pittosporum, including some that are not native to New Zealand, indicating that it may be able to damage a wide range of Pittosporum species. The effect T. vitreoradiata is having on the horticultural trade in the UK is discussed.