Impact of Temperature and Humidity on Temporal Changes in Bombyx Mori Gonads Growth

Impact of temperature and humidity on the average rates of growth of gonads and testes for the different stages of Bombyx mori Linn, was evaluated in the present study. The larval gonads grew bigger with the advancement of age. The high temperature of 34±1ºC shortened the duration and reduced the gonads weights. The average rates of growth per day was the highest at 26±1ºC even though, the 18±1ºC gonads were the less heavy. Concerning the pre-pupal gonads, they followed the same trend. In the pupal stage, the weight of testes increase gradually with the advancement of age to reach the maximum growth before the emergence of adult, then these weights began to decrease gains except in 26±1ºC temperature when no reduction occurred. The average rate of growth per day was the highest in 26±1ºC temperature and 80±5% RH. In respect of the adult stage weight of testes continued its gradual reduction till the end of the life span. The reduction which occurred in 18±1ºC was more than that happened in 26±1ºC. Significant differences were obtained among all parameters of matereological factors.