Cypress aphid

Cypress aphid is one of the possible causes of dieback on some conifer hedges. It has become an increasingly problematic on some conifers since the 1980s, particularly on Leyland cypress.

Save to My scrapbook
Cypress aphid damage

Quick facts

Common name Cypress aphid
Scientific name Cinara cupressivora
Plants affected Cupressus macrocarpa, Lawson's cypress (Chamaecyparis lawsoniana), Leyland cypress (× Cuprocyparis leylandii) and Thuja
Main symptoms Conifers suffer extensive drying up and browning of the foliage in summer
Most active April-June

Join the RHS today and get 12 months for the price of 9

Join now

Gardeners' calendar

Find out what to do this month with our gardeners' calendar

Advice from the RHS

You may also like

Get involved

The Royal Horticultural Society is the UK’s leading gardening charity. We aim to enrich everyone’s life through plants, and make the UK a greener and more beautiful place.