| abstract |
The naphthoquinone derivatives have the general formula in which R represents a hydrogen atom or a hydroxyl or ethanoyloxy group. The invention also relates to methods for their preparation and to compositions containing them and to their use as pesticides, such as fungicides, in particular insecticides and acaricides. The compounds can be derived from plants of the genus Calceolaria. The invention also relates to extracts of the genus Calceolaria and to their use as pesticides. |