Psyllids 🐛
Superfamily psylloidea
At a glance
- Looks like: Tiny jumping sap-suckers, often on new growth
- Tell-tale sign: Distorted young leaves, honeydew, waxy residue, or little protective covers called lerps
- Severity: Moderate; some species are major disease vectors on specific hosts
How to identify
Psyllids are small sap-feeding insects related to aphids and whiteflies. Adults jump when disturbed. Nymphs often sit on new leaves and may produce waxy filaments, honeydew, or shell-like lerps. On citrus, Asian citrus psyllid adults hold the body at a distinctive angle while feeding.
Damage
Feeding can curl, pit, or distort new leaves. Honeydew leads to Sooty Mold. Some psyllids are serious because they vector plant diseases, especially Asian citrus psyllid and huanglongbing in citrus.
Treatment (least-toxic first)
Following Integrated Pest Management:
- Identify the host and psyllid; citrus psyllid concerns are different from minor ornamental psyllids.
- Prune or rinse localized new-growth infestations where practical.
- Conserve natural enemies; many psyllids are suppressed outdoors.
- Avoid overfertilizing because soft flush is attractive.
- For citrus, follow local UC/IPM guidance and reporting recommendations.
Prevention
Inspect tender new growth, especially in late winter and spring. Avoid pushing constant soft growth with fertilizer or pruning.
Affects (in this guide)
Citrus, ficus, eucalyptus, pepper trees, and many ornamental or native shrubs depending on species