Please help!

Hi Cheyenne. I note that you say you have lots. Are the non pupating caterpillars disturbing the pupating ones?

Best wishes

Prem

Can you show us some photos about the breeding situation?

It is a well-known phenomenon with breeding strains of suraka that some don’t make a cocoon at all. Separate them from the others as soon as they fall into the real prepupal rest and put them on a tissue or similar. Most of them will pupate without any flaws and the moths will hatch accordingly.

Some A. suraka will not build a cocoon before pupating and still pupate decently,
at least some of them, - when the prepupae/fresh pupae is taking care of, regarding that special circumstance.

I also think though that the adults of these caterpillars/pupae should not be included with/in breeding or selling eggs no matter if they look well or not.
It is an obvious flaw and a sign of an unhealthy strain in my opinion and most of them will not emerge properly or produce healthy offspring.
The last years it was quite a problem to find a healthy strain where this does not happe,n and adults are healthy and eager to mate.
So i hope this will change soon and you will have many healthy adults either way