Studies of the biology and economic traits of mulberry (Bombyx mori L.) single csr hybrids on v-1 mulberry variety

The experiment was conducted at Sericulture Research Unit, V.N.M.K.V, Parbhani, during 2019–20 laid in Randomized Block Design with eight treatments, replicated thrice. Disease free laying's of silkworm hybrids (CSR₂xCSR₄),(CSR₁₆xCSR₁₇), (CSR₅₀xCSR₅₁), (S₈xCSR₁₆), SHP₂, SHR₁, DHR₄, DHP₅ procured from Central Sericulture Research & Training Institute, Mysore was 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 SHR₁ (98.00 per cent), Minimum larval duration were observed in DHP5 (21.49 day), weight of ten mature larvae was significantly superior in hybrid SHP₂ (38.712 g), In single cocoon weight hybrid SHR₁(1.192 g) has shown superior performance followed by The hybrid CSR₅₀ x CSR₅₁ (0.267 g) recorded highest shell weight (g), The shell ratio (%) was higher in hybrid CSR₅₀x CSR⁵¹ (22.96 per cent) followed by SHP₂ (21.65 per cent). The hybrids DHR4 (978.33 m), SHR₁ (970 m), CSR₁₆x CSR₁₇ (966.67 m) superior performance in filament length (m), hybrid CSR₁₆xCSR₁₇ (0.334 g), CSR₅₀x CSR₅₁ (0.306 g) recorded significantly higher filament weight, the denier value and cocoon yield/10,000 larvae brushed, moth emergence were superior in hybrid CSR₁₆xCSR₁₇ (3.12) and (17.517 kg), (95.33 per cent) respectively. Highest ERR was observed in SHR₁ (94.33 per cent), CSR₁₆xCSR₁₇ (93.72 per cent).