Viola tricolor (Heartsease) herb is used to treat inflammations of the larynx mucous coat, gastritis, and for bronchitis as an expectorant, neurotic disorders and cramps. All the three kinds of pyrethrums contain essential oil, but their main compounds known as pyrethrins and cinerins are insecticide. Preparations of these plants - pyrethrum extract, dried flowers powder, and alcoholic extract are used to control pests in poultry...