Hello Gerd,
Sorry Can't write/ speak german so good. Hope you can understand English.
I'm quite succesful breeding the mittrei. I have 15 natural pairings and yesterday I did my first handpair. It was amazing it took me half an hour to let the male attach himself with his claspers to the female.
I'm selling a lot eggs here on Actias. Fellow breeders have larvae eating Rhus, Gunni or Liquidamber. in winter days yoi can give Gunni. Gunni has leaves all year long.
If you need some more breeding tips just ask.
All the best. Cheers!