Abstract
Treatment of potato leaf disks with fourneo-clerodane diterpenes fromTeucrium (eriocephalin, teucrin-A, teucvin, and teuscorolide) significantly reduced feeding by larvae ofLeptinotarsa decemlineata (Colorado potato beetle). Choice and no-choice tests suggest that teuscorolide acts as a feeding deterrent, whereas the antifeedant activity of teucrin-A, teucvin, and eriocephalin is likely associated with a toxic mode of action. Nutritional tests, antifeedant simulation assays, and posttreatment studies confirmed that teucrin-A can be categorized by its mode of action as a toxin, rather than as a feeding deterrent.
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Ortego, F., Rodríguez, B. & Castañera, P. Effects ofneo-clerodane diterpenes fromTeucrium on feeding behavior of colorado potato beetle larvae. J Chem Ecol 21, 1375–1386 (1995). https://doi.org/10.1007/BF02027569
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DOI: https://doi.org/10.1007/BF02027569