This rapid assessment shows: Risk of entry –moderately likely (on growing plants from Asia) There have been multiple interceptions of D. decempuncta on marginal aquatic plants (mainly Piper sarmentosum) imported from Singapore. D. decempuncta is broadly polyphagous and it is therefore possible that it could transfer from aquatic plants to other ornamental plants grown under protection in the vicinity. It is likely to continue to enter the UK on growing plants from Asia and there may be localised transient populations on protected ornamental plants. There is no clear pathway from protected ornamental plant collections to commercial vegetable glasshouses. Risk of establishment – unlikely to moderately likely on indoor plantings, very unlikely outdoors Dialeuropora decempuncta is a tropical species that is very unlikely to naturalise and overwinter outdoors in Britain, but may establish on indoor plantings. It has been regularly intercepted in the UK for a decade on growing plants, and no incursions have so far been reported. Rate of spread – moderate (in trade) Economic impact – may have a small impact to indoor ornamentals Dialeuropora decempuncta is an economic pest of a small number of crops, most notably mulberry, however, mulberry is usually grown outdoors in the UK whereas D. decempuncta is likely to be restricted to indoor plantings. It can breed on a range of glasshouse vegetable crops, including aubergine, cucumber and tomato, although it has not been recorded having an economic impact on these crops. Endangered area – indoor plantings Risk management – may be controlled by using the same products currently used for other whiteflies In the absence of phytosanitary measures D. decempuncta is likely to continue to arrive in the UK. However, if incursions occur, it may be controlled using the same products used for other glasshouse whiteflies already present in the UK.