Mangestribet elmebarkbille(Scolytus multistriatus). Spreder svampesporer af elmesyge til nye træer. Bark beetle, smaller European elm. The betle are spreading spores from the Dutch Elm Disease to young trees.

Foto: Gerald J. Lenhard, Louisiana State University, www.forestryimages.org

Tæt ved billen kan indgangshullet skimtes. (Scolytus multistriatus). Bark beetle, smaller European elm.

Foto: R. Scott Cameron, International Paper, www.forestryimages.org

Her er barken fjernet og de hvide larver ses tydeligt for enden af gangene. (Scolytus multistriatus). Bark beetle, smaller European elm. The larvae at the end of the galleri.

Foto: R. Scott Cameron, International Paper, www.forestryimages.org

Sådanne gange er typiske for de enkelte barkbille arter. (Scolytus multistriatus). Bark beetle, smaller European elm. Typical galleries under bark.

Foto: James Solomon, USDA Forest Service, www.forestryimages.org

Her er det gange forårsaget af stor elmebarkbille. (Scolytus scolytus). Large elm bark beetle. Typical galleries under bark.

Foto: Gyorgy Csoka, Hungary Forest Research Institute, www.forestryimages.org