Pest & Disease Profile · Insect pest
Whiteflies
Whiteflies are small sap-feeding insects. Adults may fly when leaves are disturbed, while immature stages remain attached to leaf undersides.
What to observe
- Small pale adults flying from disturbed foliage
- Flattened immature stages on leaf undersides
- Honeydew and associated surface growth where populations are high
- General decline or chlorosis that tracks with infestation intensity
Common look-alikes
- Small moth-like insects
- Scale insects or residue on leaf undersides
- Aphid-related honeydew
- Non-pest chlorosis
Evidence that improves confirmation
- Inspect adults and immature stages
- Use sticky cards for trend data, not as the sole identification tool
- Check whether symptoms spatially correspond with actual colonies
Risk context
- Protected environments can allow continuous reproduction
- New plants can introduce hidden immature stages
- Honeydew can create secondary cleanliness and microbial concerns
Management principles
- Strengthen incoming-plant inspection
- Remove heavily infested material where site policy allows
- Monitor adult and immature stages separately
- Use lawful, crop-appropriate controls and verify population trends
Keep the conclusion proportional to the evidence
Use a confirmed identification when available. When evidence is incomplete, label the conclusion as a suspicion or differential rather than presenting it as proven.