Mulberry silkworm was selected as a

Mulberry silkworm was selected as a model system for studying immunity responses against bacteria, because it is of great econo-mic importance due to its unique white silk. Last larval instar of this silkworm is selected for the experiments; the main advantage is that in the last larval instar, the silk protein synthesis and most larval mortality was as a result of diseases caused in this stage.