Fuente: WIPO "essential oil or extracts" Novel herbal mosquito repellent compositions comprising extracts of Blumea lacera which are prepared by solvent extraction and also by steam distillation are disclosed. These extracts and essential oils of Blumea Lacera are standardized, evaluated and characterized using chromatographic techniques. Further herbal mosquito repellent formulations in liquid, vapour and mat form are prepared from the said extracts. Polymer -bounded compositions for slow release are also prepared.