Lufenuron, a new pesticide on the market is a benzoylurea pesticide that inhibits the production of Chitin in insects. Without Chitin, a larval flea will never develop a hard outer shell (exoskeleton). With its inner organs exposed to air, the insect dies from dehydration soon after hatching or molting (shedding of its old, small shell).
Lufenuron is also used to fight fungal infections, since fungus cell walls are about one third Chitin.
Lufenuron is also sold as an agricultural pesticide against Lepidopterans, eriophid mites, and western flower thrips. It is an effective anti fungal in plants.