Bio efficacy of some piperaceae plant extracts against Plutella xylostella L. (Lepidoptera: Plutellidae).

The extracts of Piper sarmentosum Roxb., Piper retrofractum Vahl, Piper interruptum Opiz and Piper nigrum plants belonging to the family Piperaceae were evaluated for their efficacy against diamondback moth, Plutello xylostella L. third instars under laboratory conditions.