 The pupa is allowed to hatch and the leftover cocoon is then used to create cotton.While the "Bombyx mori"(also called mulberry silkworm or mulberry silk moth) are the preferred species for creating ahimsa silk, there are a few other types of species that fall under the category of ahimsa silk, which is defined not necessarily by the species of the moth involved but by the methods for harvesting the cocoon.The other types of silkworm that are used for this process are a subspecies of the ailanthus silkmoth and several types of tussah or Tasar moths