Blood Orange Leaf Curl: Insect Pest Diagnosis

Curling New Growth on Blood Orange: Insect Investigation

A blood orange (Citrus × sinensis 'Moro') in Henderson, NV with curled new leaves and fruit drop has insect pest damage on the tender flush.

Citrus Leaf Curl = Insect Feeding

• Citrus leaves curl in response to sap-feeding on undersides.
• New growth = most tender = preferred target.
• Fruit drop = tree aborting stressed fruit.

Likely Pests (Check Undersides with Magnifier)

• Aphids: Clusters on new growth. Honeydew → ants/sooty mold.
• Citrus leafminer: Serpentine trails in leaves. Distorts growth.
• Thrips: Tiny, rasp tissue. Silvering, curling.
• Asian citrus psyllid: Vector of HLB (greening). Report if suspected.

Immediate Actions

1. Inspect closely with 10× lens. Photograph pests for ID help.
2. Horticultural oil or neem oil: Spray new growth thoroughly. 0-day PHI. Repeat 7–10 days.
3. Insecticidal soap: Alternative for aphids/thrips.
4. Monitor fruit drop: Some June drop is normal. Excessive = stress.

Curled citrus leaves are almost always insects. The magnifier reveals the culprit instantly.