Black Willow Bark Aphid

Pterocomma salicis

Black Willow Bark Aphid

by chris_dagorne (All rights reserved)
1 of 4
A close up of a colony Black Willow Bark Aphid insects Pterocomma salicis
by chris_dagorne (All rights reserved)
1 of 4
Black Willow Bark Aphids are small, sap-sucking insects. This species feeds on the twigs of Willow plants. Aphids aggregate in large groups on Willow. They have close relationships with ants, who harvest honeydew produced by the aphids. Honeydew is a sweet sticky solution. It can be problematic because it encourages the growth of black mould on plants.
Free download for your phone or tablet
Download on the App StoreGet it on Google Play


Can stunt the growth of small Willow plants.
Eaten by ladybugs and lacewing larvae.


Adults: The adult aphids are pear-shaped and black-grey with white spots and a pair of red spikes on the rear end. They're under 0.5 cm. Nymphs: Smaller and paler grey.


Copious amounts of honeydew may be evident near the site aphids are present. Honeydew can encourage the growth of black mould, so this may be notable too. Ants will protect aphids from some garden predators. Healthy Willow plants will survive damage.











The UK and Europe, Asia, North America

Biological treatment

These aphids provide an abundance of food for wildlife active during autumn. Despite their large numbers, they don't seem to affect overall tree health. Healthy, established trees can withstand damage. Spiders, ladybugs, lacewing, and hoverfly larvae eat aphids. You can attract these to your garden by providing insect habitats. These include things like hanging baskets, climbing plants, shrubs & trees, or strips of wildflowers. If aphid colonies become too large and plants begin to suffer, give plants a spray of soapy water or jet them off with the garden hose.


Free download for your phone or tablet
Download on the App StoreGet it on Google Play

Plant Knowledge

Search our ever-growing knowledge base to find plants and information. Find out about pests and diseases you should be keeping an eye out for. Watch How to videos or follow step by step guides for tasks in the garden. Free download for your phone or tablet.
Download on the App StoreGet it on Google Play