Wipe off or prune away colonies of aphids from leaves and buds. Use a forceful stream of plain water to wash off aphids and honeydew. Use insecticidal soaps to kill aphids on contact and spare beneficials such as lacewings. These products do not leave toxic residues. Prevention Use slow-release fertilizers.
Some aphids reproduce more quickly on plants with high levels of nitrogen in their leaves and buds.
Avoid excessive pruning because it stimulates aphid-attracting growth.