Non-Chemical Management
- Viburnum davidii is not infested. The "snowball" viburnums are preferred hosts.
- Hand-wipe or prune to control small, localized infestations when practical.
- Wash aphids from foliage with a strong stream of water.
- Encourage predators such as ladybird beetles, lacewings, syrphid (hover) fly larvae, and predatory wasps. Avoid use of broad-spectrum insecticides which kill these beneficials.
- Control honeydew-feeding ants.
- Provide proper nutrition. High levels of nitrogen in the foliage encourage aphid reproduction. Switch to a slow-release or low-nitrogen fertilizer.
Select non-chemical management options as your first choice!