Study on economic traits of bivoltine silkworm hybrids on V1 mulberry variety of Morus alba

Abstract

The present investigation was undertaken during August to December 2017-18 to study on economic traits of bivoltine silkworm hybrids on V1 mulberry varietiey of 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), (CSR58×CSR16), SHP2, SHR1, DHR4, DHP5 procured from Central Sericulture Research & Training Institute, Mysore were used as test hybrid against mulberry variety V-1, in present investigation. During study it was observed that hatching percentage were significantly highest in hybrid CSR16xCSR17 (97.48 percent), Minimum larval duration were observed in CSR58xCSR16 (20.39), The weight of ten mature larvae was significantly superior in hybrids CSR16xCSR17 (37.92 g) and DHP5 (36.96 g), In single cocoon weight hybrid CSR16xCSR17 (1.558 g) has shown superior performance followed by SHR1 (1.538 g). The hybrid CSR16xCSR17(0.281g) recorded highest shell weight (g), The shell ratio (%) was higher in hybrid CSR2xCSR4 (20.15 percent).The hybrids DHP5 (987 m), CSR16xCSR17 (937.67 m), CSR50xCSR51 (937.62 m) recorded superior performance in filament length (m), hybrid CSR16xCSR17 (1.787 g) recorded significantly higher filament weight, the denier value and cocoon yield/10,000 larvae brushed were superior in hybrid SHR1(1.869) and SHR1(15.40 kg) respectively, the lowest disease incidence was recorded in hybrid CSR50xCSR51 (6.00 percent).