Effect of feeding mulberry variety G-4 on economic traits of bivoltine silkworm (Bombyx mori L.) hybrids

Abstract

The present investigation was undertaken during August to December 2018, to study the economic traits of bivoltine silkworm hybrids on G-4 mulberry variety (Morus alba). The experiment was conducted in rearing house at Sericulture Research Unit, VNMKV, Parbhani laid in Randomized Block Design with eight treatments, replicated thrice. Disease free layings of silkworm hybrids (CSR2×CSR4), (CSR16×CSR17), (CSR50×CSR51), (S8×CSR16), SHP2, SHR1, DHR4, DHP5 procured from Central Sericulture Research & Training Institute, Mysore were used as test hybrid against mulberry variety G-4 in present investigation. During study it was observed that hatching percentage were significantly highest in hybrid CSR16xCSR17 (96.19 per cent), Minimum larval duration was observed CSR2×CSR4 (21.77). The weight of ten mature larvae was significantly superior in hybrids CSR16xCSR17 (40.44 g) and CSR2×CSR4 (38.40 g), In single cocoon weight hybrid CSR16xCSR17 (1.31 g) has shown superior performance. The hybrid CSR16xCSR17 (0.312g) recorded highest shell weight (g). The shell ratio (%) was higher in hybrid CSR16xCSR17 (24.17 per cent). The hybrids CSR16xCSR17 (951 m) CSR2×CSR4 (919 m), CSR50xCSR51 (907. m) recorded superior performance in filament length (m), hybrid CSR16xCSR17 (0.331 g) recorded significantly higher filament weight, the denier value and cocoon yield/10,000 larvae brushed were superior in hybrid CSR16xCSR17 (3.13) and SHR1 (16.59 kg) respectively.