feeding caterpillars from caligo butterflies

Hello,

I have catrepillars from the caligo (owl butterfly)

Then should be eating banana leaves but they are not eating here....

Can anyone tell me what i can feed them other than banana leaves?

because otherwise they won't survive i think
  <img src="http://i104.photobucket.com/albums/m192/ro…0611_194056.jpg" alt="20130611_194056.jpg" title="20130611_194056.jpg" style="font-size: 0.8em;" />