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Thank you for the reply.

No, we have not yet. But there is a story behind this. Picromerus bidens has an egg diapause (a rare case in Pentatomidae bugs). However, there are some records of Picromerus adults in spring or early summer, although they should be in the field not earlier than in June-July. It was suggested that adults might be parasitized by phasiines, who castrate adults (OMG!). These poor adults do not reproduce, but survive (or try to) winter instead of reproduction and peaceful death in autumn.

So, to clarify this (what do adults do in spring?), we want to try to find parasitized adults in the field, and\or parasitize adults from the culture and see whether they reproduce or survive winter...

I have a couple of papers on Picromerus bidens cycle and diapause and will be happy to share. I would definitely appreciate any thoughts and advises.

D.