4
$\begingroup$

I just found these small insects on a Saponaria.

After search, it could be Halyomorpha halys, but I am really not sure.

enter image description here

Potential larva of *Halyomorpha halys*

Can anyone confirm? If so, should I kill them as they are considered as agricultural pest?

They are about 3-5mm. I am living in the south of Paris (48.814766, 2.334659)

$\endgroup$
4
$\begingroup$

This is an instar (nymph) of a shield or stink bug (order Hemiptera, family [Pentatomidae])(https://en.wikipedia.org/wiki/Pentatomidae).

This appears to be similar to the 2nd (or possibly 3rd) instar of Halyomorpha halys.

enter image description here

European and Mediterranean Plant Protection Organization; Credit: Matteo Maspero

UTIA suggests the 2nd instar begins to develop an almost black appearance, where that blackness gradually shifts to browner shades in subsequent instars. According to Medal et al. (2013)1 the 2nd and 3rd instars have median lengths of ~2.75 and ~4.25 mm, respectively. According to WSU Extension, instar nymphs of H. halys are spiny (including on the shoulders) and possess light bands on the antennae.

enter image description here

Source: WSU Extension

This University of Wisconsin Extension site provides a fairly similar photo to your specimens, which can be found at bugguide.com:

enter image description here

Source: bugguide.com; Credit: Yurika Alexander


Citations

1 Medal, J., Smith, T. and Santa Cruz, A., 2013. Biology of the brown marmorated stink bug Halyomorpha halys (Heteroptera: Pentatomidae) in the laboratory. Florida Entomologist, 96(3): 1209-1213. PDF

$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.