Spiked Shieldbug Picromerus bidens
Home > Heteroptera >>Pentatomoidea
Length 12-13.5 mm
Phenology Adult: July-November.
Description A large Brown predatory shieldbug, with distinctive thorn-like projections on the front of the pronotum There can be two orange marks on the top corners of the shield Scutellum and again toward the front of the pronotom whilst not definite these markings are relatively consistent
Life Cycle Usually overwinters as eggs and less frequently as larvae, becoming adult by July/August. Nymphs are greyish-black with pale banded legs and yellow banded antennae. Like the Adult they are predacious , feeding on the larvae of insects, particularly caterpillars but will also suck sap from plants.
Habitat Usually on flower-rich woodland edge habitats also frequent on heathland.Close to water margins on bramble the phenology often coinciding with Sawfly larave and similar which it predates
IMAGE ABOVE WITH PERMISSION (C) ASHLEY WOOD
Habitat Rich Vegetation by water and woodland margins
A predaceous species (except for young larvae), mainly on larvae of Lepidoptera and Chrysomelidae (leaf beetles).
Has found some use as a biological control agent, eg against European pine moth.
IMAGE 24113 (C) 2008 COLIN DUKE
IMAGE 24135 (C) 2008 COLIN DUKE