Five insulin-like peptide genes were cloned.
RNAi of LdILP2 impaired pupation and adult emergence.
RNAi of LdILP2 inhibited IIS signaling pathway.
JH and 20E titers were lowered in the LdILP2 RNAi larvae.
JH and 20E pathways were disrupted in the LdILP2 RNAi larvae.