SPOCK (Piriproxifen) is a pyridine derivative with insecticidal activity by contact and ingestion that behaves like a juvenile hormone acting on the growth of insects presented in the form of an emulsifiable concentrate to apply in foliar spray. The active ingredient in SPOCK has a structure similar to that of insect juvenile hormone. Exposure to this compound at the time of moult results in the induction of insects that have mixed larva / pupa or larva / adult morphologies. Another property is that, in adults, they disrupt normal reproductive physiology and act as a method of birth control.