Browsing by Author "Pesel, Erika"

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    • Changes in hydroxamic acid levels of wheat plants induced by aphid feeding 
      Niemeyer, Hermann M.; Pesel, Erika; Copaja, Sylvia V.; Bravo, Héctor R.; Franke, Stephan; Francke, Wittko (1989)
      Seedlings of four wheat cultivars were infested with Metopolophium dirhodum nymphs. After aphids had fed for 40 hr on the plants, the levels of the defense metabolite 2,4-dihydroxy-7-methoxy-1,4-benzoxazin-3-one had changed. ...
    • Ingestion of the benzoxazinone dimboa from wheat plants by aphids 
      Niemeyer Marich, August; Pesel, Erika; Franke, Stephan; Francke, Wittko (1989)
      DIMBOA (2,4-dihydroxy-7-methoxy- 1,4-benzoxazin-3-one was found in nymphs of the aphids Metopolophium dirhodum and Sitobion avenae which had fed on DIMBOA-containing wheat seedlings and artificial diets. DIMBOA levels found ...