Isolation of Nematicidal Polyacetylenes from<i>Carthamus tinctorius</i>L.

Abstract

Two nematicidal polyacetylenes, 3-cis,11-trans- and 3-trans,11-trans-trideca-1,3,11-triene-5,7,9-triyne, were isolated from flowers of Carthamus tinctorius L., by column chromatography and high speed liquid chromatography under the dark condition. The nematicidal activities of 3-cis,11-trans- and 3-trans,11-trans-isomer to Aphelenchoides besseyi were 80% at 10 ppm and 95% at 1 ppm, respectively.