Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

In vivo effect of mixtures of allelochemicals on the life cycle of the European corn borer, Ostrinia nubilalis.

Abstract

The effect of simultaneous ingestion of dillapiole (extracted from Piper cubeba), a compound capable of inhibiting the activity of cytochrome P-450 epoxidase in microsomal preparations of midguts of the pyralid Ostrinia nubilalis, and of 2 insecticidal allelochemicals, tenulin (extracted from Helenium amarum) and phenylheptatriyne (from Bidens pilosa) on 10-day old larvae of O. nubilalis was studied in the laboratory. Dillapiole did not enhance the toxicity of the other allelochemicals, but, when applied alone, it was toxic to larvae, and inhibited their growth. Possible reasons for the lack of synergism or potentiation by dillapiole of the insecticidal activity of the other allelochemicals are considered.