Effect of temperature and relative humidity on spinning behaviour of silkworm (Bombyx mori.L)

The rate of spinning of silkworm larva (Bombyx mori. L) was slow at 22°C and fast at 38°C. The time taken for completion of cocoon was longest at 98±2% and least at 40± 2% RH. However, good quality cocoons were spun at 22°C and 65±5% RH, hence it would be advantageous to maintain this temperature and relative humidity at the time of cocoon spinning in the case of CB race of silkworm