Author(s):

Chandrashekharaiah M, Rathore MS and Sinha RB

Abstract: Tasar sericulture is dominated by the DABA eco-race as a commercial crop and to some extent wild ecoraces such as Sukinda, Sarihan, Laria, Modal, Simlipal, Raily, Bhandara, and Andhra local. Majority of these ecoraces are of green larval type, as a cryptic association with the ecological niche. Recently, a new bivoltine race of DABA called BDR-10 has been developed through recurrent selection of yellow larvae at Basic Seed Multiplication and Training Center, Boirdadar, Chhattisgarh and is presently under popularization at different tasar producing state. Multi-location trials conducted at different parts of India indicated that the average larval weight as well as cocoon yield was negatively correlated with altitude (Above Mean Sea Level-AMSL). The average cocoon yield per dfl was 61.10±37.10 (Mean±SD) and highest cocoon yield was recorded at CTSSS, Kargi Kota, Deoghar, Dudhi, Madhupur, Pali and Bhagalpur. The cocoon, pupal and shell weight ranged from 14.00 g to 9.59 g, 9.60 g to 12.28 g and 1.95 g to 1.50 g, respectively. Correlation analysis also revealed that cocoon weight, pupal weight, shell weight and S.R.% were negatively influenced by the AMSL. But, positive correlation was recorded between cocoon & pupal weight, cocoon & shell weight and pupal & shell weight.

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