Woolly Aphid

Typically found on trees and shrubs in temperate climates; common hosts include elm, apple, pear, hawthorn, and alder trees.

They feed on plant sap by piercing stems, twigs, and leaves with needle-like mouthparts. Many species move between a primary host (for overwintering) and a secondary host (for summer feeding).

These aphids secrete white, waxy strands that create a 'woolly' or cotton-like appearance to protect the colony from predators and environmental conditions. They often cluster in large groups on branches or roots.

Risks: Can cause significant damage to plants (e.g., galls, distorted growth, cankers) and secrete honeydew which promotes sooty mold. Benefits: They serve as a food source for predatory insects like lacewings, ladybugs, and parasitic wasps.