Thread subject: Diptera.info :: aquatic stratiomyidae

Posted by Cranefly on 30-01-2010 07:36
#3

I want to add that early spring in the best time for collecting for larvae which hibernate at larval stage. When they are taken under warm laboratory conditions they emerge quickly. When you collect in summer you dont't know their age. And as for larvae taken in autumn - I put them into fridge till middle of January and water them (2-5 drops of water) every 4-6 days. As soon as you take them out they pupate and emerge at the end of January - February.
It is necessary for some species that the pupa must be hold by substratum and be immobile at the moment when imago emerges. It supports imago at the moment of leaving the pupa and no damages of wings and legs happen.