Limonoids from the Meliaceae and Rutaceae reduce feeding, growth and development of Ostrinia nubilalis
1987
Arnason, J.T. | Philogène, B.J.R. | Donskov, N. | Kubo, I.
Six limonoids from the Rutaceae and Meliaceae were evaluated for their effect on the European corn borer, Ostrinia nubilalis Hübner (Lepidoptera: Pyralidae). Antifeedant activity increased in the order gedunin, bussein, entandrophragmin, nomilin, cedrelone, anthothecol. When incorporated into artifical diets of neonates at 50 ppm all compounds either caused larval mortality or growth reduction of survivors. However in a study with naive third instar larvae, only cedrelone and anthothecol were effective in reducing efficiency of conversion of ingested food at concentrations of 100 ppm or less. In sublethal trials at 10 ppm in diet, these two substances led to growth reduction of larvae and reduced female, but not male pupal weights, percent pupation, adult emergence and number of eggs per female. The results are discussed in terms of structure-activity relationships.
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