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Common Green Shield Bug

©Rachel Scopes

Common green shieldbug

The common shieldbug was once restricted to Southern England, but has since been moving northwards and is now quite widespread. It can be found in all kinds of habitats from gardens to farms.

Enw gwyddonol

Palomena prasina

Pryd i'w gweld

May to November

Species information

Ystadegau

Length: 1.3cm
Common.

Ynghylch

A recent beneficiary of climate change, the common green shieldbug was once restricted to Southern England. In recent years, however, it has been on the march, and is now common and widespread across much of England and Wales, and spreading further northwards. The common green shieldbug feeds on a wide variety of plants, helping to make this one species which could turn up anywhere from garden to farm. Adults overwinter and emerge in spring, laying their eggs on the undersides of leaves. The rounded nymphs appear in June and new adults are present in early autumn.

Sut i'w hadnabod

There are two species of green shieldbug in the UK - one native (the common green shieldbug) and one that arrived very recently from Europe (the southern green shieldbug, Nezara viridula). The common green shieldbug is bright green with tiny black dots and dark wings, while the southern green shieldbug is uniformly green in colour and has pale wing membranes.

Dosbarthiad

Mainly found in England and Wales, but spreading north.

Roeddech chi yn gwybod?

Common green shieldbugs do not damage plants by drawing their sap, but the recently arrived southern green shieldbug may damage some vegetables, especially runner and French bean pods. However, this species is most numerous in late summer, after the cropping period, so gardeners don't need to worry about its presence in the country just yet.