“…PPN is classified as a JH analog, which emulates the effects of JH and thus changes JH and ecdysteroid titers in arthropods (Bitondi et al, 1998;Zufelato et al, 2000). Similar to other JH analogs, PPN can affect the homeostasis of hormones in insects and inhibit embryogenesis, egg hatching, metamorphosis and adult eclosion, and resulting in the death of insects (Glancey et al, 1990;Reimer et al, 1991;Miyamoto et al, 1993;Santos et al, 2001).…”