Studies on the New Toxic Substances to Insects, Destruxin A and B, Produced by Oospora destructor

Abstract

Outline of this report was presented as communication to Editor in this journal. New toxic substancs, m. p.188-188.5°C, C29H47O7N5 and m. p.234°C, C25H42O6N4 wcre isolated from the active syrup extracted from the culture filtrate and the fungai mats of Oospora destructor (METCH.) DELAC. and they arenamed destruxin A and B, respectively. Destruxin and B showed the strong toxicity to silkwormsand mice by injection, but the toxicity to the potato lady beetles by the feeding was not so strong as in the case of the injection.