Insecticidal and antifeedant activities of two glucosides isolated from the seeds of Simmondsia chinensis (link) Schneider against Cotton leafworm, Spodoptera littoralis | ||
Journal of Pest Control and Environmental Sciences | ||
Volume 14, Issue 2, December 2006, Pages 271-282 PDF (175.52 K) | ||
Document Type: Original Article | ||
DOI: 10.21608/jpces.2006.460751 | ||
Authors | ||
Moustafa A. Abbassy1; Abdel-salam H. Belal1; Samir A. M. Abdel-galeil* 2; Mona A. A. Abdel Rasoul1 | ||
1Department of Pest Control and Environmental Protection, Faculty of Agriculture, Damanhour, Alexandria University, Damanhour, Egypt | ||
2Department of Pesticide Chemistry, Faculty of Agriculture, 21545-El-Shatby, Alexandria University, Alexandria, Egypt | ||
Abstract | ||
Insecticidal and antifeedant activities of four extracts of the seeds of jojoba plant, Simmondsia chinensis (link) Schneider, were evaluated against the third instar larvae of Spodoptera littoralis (Boisd) using topical application and non-choice leaf disk assays, respectively. Chloroform extract showed the strongest insecticidal and antifeedant effects among the tested extracts. Bioassay-driven fractionations of chloroform extract over silica gel columns followed by recrystallizations afforded two glucosides. The structure of the isolated glucosides was established by physicochemical properties and spectroscopic analyses. The isolated glucosides, simmondsin and simmondsin 2`-ferulate, were tested for their insecticidal and antifeedant activities. In topical application assay, simmondsin and simmondsin 2`-ferulate showed strong insecticidal activity with LD50 values of 1.49 and 2.58 µg / larva, respectively. When tested for antifeedant activity, both compounds showed pronounced activity in a concentrationdependent manner. This is the first study on the insecticidal and antifeedant activities of S. chinensis seed extracts as well as the isolated glucosides. | ||
Keywords | ||
Simmondsia chinensis; insecticidal activity; antifeedant activity; glucosides; Spodoptera littoralis | ||
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