Aphids on Viburnum: Curling Leaves and Black Insects

Classic Aphid Infestation

Leaves folding under with tiny black insects inside are aphids. They suck sap, causing curl and discoloration. Ants often tend aphids for honeydew.

Control

• Blast with water 3x daily until gone.
• Escalate to horticultural soap or pyrethrum if needed.
• Control ants to reduce aphid farming.

Viburnums are otherwise tough; aphids are a seasonal nuisance.