Effect of Fabiana imbricata constituents on Rhopalosiphum padi and Heliothis zea

Abstract

The main secondary metabolites of Fabiana imbricata showed toxicity towards the greenbug Rhopalosiphum padi when administered in an artificial diet. A dose‐dependent toxicity was observed for fabiaimbricatan‐15‐oic acid and oleanolic acid at doses up to 3.0 mM (p <0.01). Both compounds apparently act as antifeedants at higher doses. Rutin also showed a dose‐related toxicity. Scopoletin and p‐hydroxyacetophenone were toxic at 6.0 mM. None of the compounds tested were toxic towards the fifth instar Heliothis zea larvae. Copyright © 1995 John Wiley & Sons, Ltd.