| abstract |
The invention relates to certain naphthoquinone derivatives, some of which are novel, of general formula (I) in which R represents a hydrogen atom or a hydroxyl or an ethanoyloxy group; methods for their preparation; compositions containing such compounds and their use as pesticides, such as fungicides and, especially, insecticides and acaricides. Compounds of formula (I) may be derived from plants of the genus Calceolaria and the invention therefore also relates to extracts of a Calceolaria species and their use as pesticides. |