Eri culture is mostly confined to the Brahmaputra valley of Assam. It is also practiced in few district of the neighboring states mainly Arunachal Pradesh, Manipur, Meghalaya, Nagaland and other non traditional states of India like Andhra Pradesh, Bihar, Chhattisgarh, Gujrat, Jharkhand, Orissa, Tamilnadu, Utrakhand, West Bengal,
Eri silkworm is multivoltine in nature. It can rear 4-5 times in a year.
There are 26 eco-races of eri silkworm like Borduar, Khanapara, Kokrajhar, Titabar, Diphu, Genung, Nongpoh etc.
Feeding: 4-5 feeding should be given per day at regular intervals.