Abstract
AbstractAn experiment of outdoor rearing was conducted with the available Sukinda (TV) stock of BSM&TC, Sundargarh (SG), CTSSS, Lakha (CTS) and CTR&TI, Ranchi. The objective of this activity is to utilize economic wild life, conserving the associated environment for sustainable rural and tribal development (Raffi and Ramanujam, 2001; Gill and Lal, 2002; Mahapatra, 2009).The crop performance of SG showed highest cocoon yield i.e., 83 cocoons / dfl in 1st crop followed by 80 cocoons / dfl in 3rd crop and 42 cocoons / dfl during 2nd crop. Yellow coloured cocoons dominated (94-96%) the population in all the three crops. The cocoon weight, Shell weight and Silk Ratio were (9.72g, 1.07g&11 %) in 1st crop,(9.77g,1.05g & 10.75%) in 2nd crop and (11.11g,1.79g & 16.11%) in commercial third crop season. The ERR were 41.64 %, 50.00 % and 74.51% in 1st, 2nd and 3rd crop respectively. This approach for semi-domesticated and commercially exploited Sukinda ecoraces can further enhances their potential because of better inherent performance levels under in situ (Suryanarayana and Srivastava, 2005) over the current basic and commercial stocks maintained ex situ.
Highlights
An experiment of outdoor rearing was conducted with the available Sukinda (TV) stock of BSM&TC, Sundargarh (SG), CTSSS, Lakha (CTS) and CTR&TI, Ranchi
Sukinda TV cocoons of SG lot harvested from third crop were grouped into four groups/lines on the basis of cocoon colour and weight for assessing the preservation behavior of the harvested cocoons viz. SG-1, SG – 2, SG - 3 and SG
No of cocoons preserved for study No of male moths emerged (Erratic) No of female moths emerged (Err.) Total moths emerged (Erratic) Dead cocoons sorted out Total preservation loss (%)
Summary
The grainage data indicated highest coupling in SG-1 (66.44%) compared to 55.63 % in SG-2, 56.12 % in SG- 3 and 42. 05 % in SG line. The grainage data indicated highest coupling in SG-1 (66.44%) compared to 55.63 % in SG-2, 56.12 % in SG- 3 and 42. The cocoon-laying ratio was found most effective in SG-1 (3.69: 1) followed by SG – 2 (4.34: 1), SG-3 (4.95: 1), and SG (6.15: 1). Highest average fecundity (242) was recorded in SG-1.While in other lines the fecundity was 215 in SG-2, 212 in SG-3 and 203 in SG group. No pebrine were found in SG-1 and SG-2 lot
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