The following pests and diseases are either already with us but being noticed more or causing more damage than previously, or, like Impatiens Necrotic Spot Virus, represent a real threat for the future. Plugs, bedding, transplants, propagation houses, hydroponics, capillary beds. Check registration, follow label directions. Use an algacide to clean up algae. Not a major threat but will be a nuisance to landscape nurseries.
Biological control works overseas but needs research input in Australia.
Garden Centre staff should discourage widespread use of pesticides to manage whiteflies on large landscape trees. It is bad for the environment and existing natural enemies and probably of no use. The second and most important virus transmitted by Western flower thrips. Not yet reported in Australia. Consult a professional diagnostic service immediately if you suspect virus.