This Research Article is an effort to study the impacts of zonal differences on the productivity and qualities of tasar cocoons of mutant strains of Antheraea mylitta D. Results obtained are indicative of the fact that the zonal differences influence the relative performances of mutant strains of Antheraea mylitta D in respect of productivity and quality of tasar cocoons. The results have clearly shown that the productivity and quality of tasar cocoons of Jharkhand and Madhya Pradesh zones are relatively better and superior to Orissa, West Bengal and Bihar Zones of tasar producing states. The performances of Daba–blue in respect of productivity and qualities of tasar cocoons have been found evidently better than the Daba–yellow and Daba–almond. The results obtained appear to be the outcome of genetic variability among the three mutant strains of A. mylitta D. on account of relative differences in their physio–genetic makeup.