What are the best Lilly Pilly psyllid resistant varieties to grow?
Syzygium or Acmena is the genus for this common Australian shrub known as Lilly Pilly. This article outlines treatment options and best species for various locations and requirements in the garden.
Psyllid damage is more prevalent in the softer leaf forms of Syzygium and Waterhousia. The common Acmena species of Lilly Pilly have a more harsh, toughened leaf, which is not as attractive to this tiny insect.
In recent years there has been many new releases and improved forms of Syzygium released. One of the key reasons new, improved species have been released is to combat psyllid foliage damage. Many of the older species were not resistant to this insect and suffered from the bubbly, disfigured leaf. Initially, this was treated with systemic chemicals and root treatment such as confidor. However, this product is no longer available as it is harmful to important pollination insects such as bees.
If you notice bubbly foliage on your Lilly-pilly, the best course of action is vigorous pruning of all affected areas, then light and regular spraying with white oil, and of course, keep your plant moist and healthy with regular liquid fertilising.
Mature psyllids are up to 5mm long and are actually tiny sap-sucking insects.
The female psyllid inserts a yellow oval shaped egg into the edge of the new leaves after mating has occurred. Tiny, immature nymphs hatch from the eggs and move to the fresh new lush foliage, where they feed and develop into pimple galls which are formed by the plant’s response to the psyllids feeding.