Abstract
The heartwood of the tropical treeLonchocarpus castilloi Standley (Leguminosae) is highly resistant to attack by the drywood termitesCryptotermes brevis (Walker); nevertheless successive extraction with hexane, diethyl ether, acetone, methanol, and water reduced its resistance to these organisms. Antitermitic properties of the extracts were bioassayed using impregnated filter paper disks. Although the five extracts reduced both feeding and survival ofC. brevis, no significant differences among them were detected. Choice feeding tests showed that termites avoided eating the paper treated with the extracts. Two flavonoid compounds isolated from the heartwood, castillen D and castillen E, impregnated into filter paper showed concentration-dependent feeding deterrent activity, but were not toxic toC. brevis.
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Reyes-Chilpa, R., Viveros-Rodríguez, N., Gómez-Garibay, F. et al. Antitermitic activity ofLonchocarpus castilloi flavonoids and heartwood extracts. J Chem Ecol 21, 455–463 (1995). https://doi.org/10.1007/BF02036742
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DOI: https://doi.org/10.1007/BF02036742