Acacia Psyllid – Psylla uncatoides
- Hosts: Acacia koa, Acacia koaia
- Distribution: Originates in southeast Australia. Also found in New Zealand, California, and Hawaii.
- Damage: Feeds primarily on the young terminal growth. Heavy infestations can severely defoliate and kill twigs and branches.
- Control: A biological control, Harmonia conformis, was successfully established in Hawaii in the 1970s. It typically maintains acacia psyllid populations below damaging levels.
- Other: This pest may be encountered more often since the introduction of its more susceptible host, Acacia koaia, into landscapes.