The Bombyxmoriis essentially monophagous and survives ultimately on mulberry leaves (Morussp.) which play an
important role in the nutrition of the silkworms, and in turn cocoon and silk.Cocoon quality is also influenced by
natural environmental conditions in which plants are grown and races of silkworm. In fact, genotype environment
interaction are major important to silkworm breeder. Environment factor is most important that affect to
silkworm. Amount of air pollutants, mainly from combustion of fossil fuel, may cause acid rain which affects to
mulberry and cocoon of Bombyxmori L