Woolly Beech Aphid (Phyllaphis fagi)
Woolly aphid forming cottony colonies on beech leaves and shoots.
Woolly beech aphid (Phyllaphis fagi) forms white, woolly colonies on beech leaves and young shoots. Honeydew and sooty mould develop, and heavily infested plants show distorted growth and reduced aesthetic value. Natural enemies such as ladybirds and hoverfly larvae are important. In protected or nursery situations, lacewings and parasitoids may be introduced as part of an IPM programme, alongside washing and pruning.
Biological Controls for Woolly Beech Aphid (Phyllaphis fagi)
The options below are examples of beneficial insects and biological products commonly used against woolly beech aphid (phyllaphis fagi). Always refer to supplier guidance and product labels for crop safety and local registration status.
Adalia bipunctata + Chrysoperla carnea
Product: Adaline + Chrysoline
Environment: outdoor
Temperature Range: 14.0 – 26.0°C
Rate: 5–10 larvae of each per infested tree or hedge section
Frequency: Repeat after 2–3 weeks if required
Predatory ladybirds and lacewings help clean up woolly aphid colonies on beech; prune heavily infested shoots where practical.
Related Biological Solutions
Growers dealing with woolly beech aphid (phyllaphis fagi) often also monitor these pests as part of a complete IPM programme: