Brown marmorated stink bug

Halyomorpha halys

Punaise diabolique

A native to East Asia

they were first recorded in Europe in 2004 and since then have become widespread in many countries including France.

They are polyphagous and are a major pest of apple, pear, kiwi, peach, apricot, cherry, hazelnut, soya and corn crops They are also a pest of peppers grown in glasshouses and polytunnels and can be a nuisance when thousands of adults enter residential and commercial buildings in the autumn to overwinter, leaving a characteristic unpleasant odour. Most other bugs that enter houses for winter do so in smaller numbers.

In their native range

there are five to six generations per year that have been reported with a relatively high minimum requirement for development of over 14°C. 

In France they are more likely to only have one or two generations a year depending on region.

They are a large bug

 that measures between 12 and 17 millimetres long and 7 to 10 millimetres wide. They are recognisable by their brown-grey back, light patterns on the edges of its elytra (hard and horny wings specific to beetles) and the two white marks on its antennae but a little care is required to avoid confusion with other species. The chart from  with the links comparing them to other native species is helpful.

Halyomorpha halys compared with other bugs


           B. Rhaphigaster nebulosa
         C. Troilus luridus
         D. Codophila varia
         E. Gonocerus acuteangulatus
         F. Coreus marginatus
         G et H. Nezara viridula
          I. Palomena prasina
          J. Picromerus bidens
          K. Pentatoma rufipes
          L. Leptoglossus occidentalis
         M. Dolycoris baccarum
          N. Arma custos
          O. Carpocoris sp.
          P. Peribalus strictus
         Q. Holcostethus sp.