Lilly Pillies make great hedging plants however some are susceptible diseases. The disease that is most prevalent is Psyllid attack, these are tiny sap sucking insects that attack the soft new growth and cause lumps or growths all over the plant.
What damage do Psyllids cause ?
Little bumps or ‘pimples’ all over the new growth. The damage is to the look of the plant, so if you want a ‘good looking hedge’, choose a Psyllid resent variety.
Can you treat Psyllids
Yes you can treat Psyllids with systemic insecticides, a better way to go is to prevent the problem by planting Psyllid resistant cultivars.
And Psyllid resistent does not mean that they are totally free of the problem, just far less likely to be attacked, and if they are it will generally be less severe.
Best Psyllid Resistant Varieties
Both Acmena smithii and Syzygium australe have some cultivars that are Psyllid resistant. Syzygium luehmanii is another.
- Syzygium australe ‘Resiliance’ is perhaps the best known. It is a compact cultivar to around 5m in height with a 2m spread. Attractive deep green foliage and non – invasive roots.
- Syzygium australe ‘Select’ is a variety that will will reach around 5m.
- Syzygium luehmanii ‘Cascade, ‘Little Lucy’ and Royal Flame’.
Acmena smithii varieties are generally Psyllid resistant so look for :
- ‘Allwyns Magic’ – A dwarf variety
- ‘Cherry surprise’ – Small leaves and reaching around 3m