The present study was carried out on the effect of biofertilizer Azotobacter chroococcumon the growth of mulberry plantMorusindica L. and larvalweight, cocoon weight, shell weight, shell ratio and effective rate of rearing (ERR) and length of silk filament of the Bombyxmori. Based on growth of mulberry plant, larval weight and the effect of Azotobacter biofertilizer on length of silk filament was more in treated and which was found to be statistically significant at