Ryman, based on the active ingredient novaluron, is a novel insecticide which belongs to the benzoylphenylurea group.
Ryman is active against larvae of insects of the orders lepidoptera, coleopteran, homoptera and diptera. It acts by inhibiting chitin formation during moulting.
Ryman acts mainly by ingestion, but has shown some contact activity. It does not have ovicidal activity, but a high percentage of mortality of first instar hatching from eggs laid on sprayed foliage occurs. It also suppresses fecundity.
Ryman was found safe to major beneficial insects and may be used as a component in integrated pest management (IPM). In India, it was found to be the best product for spodoptera control in many crops.