Effect of DIMBOA, an aphid resistance factor in wheat, on the aphid predatorEriopis connexa Germar (Coleoptera: Coccinellidae)

作者: Agustin Martos , Arturo Givovich , Hermann M. Niemeyer

DOI: 10.1007/BF00994245

关键词: HomopteraBotanyHorticultureAphididaeCoccinellidaeEriopis connexaAphidDIMBOABiologyPEST analysisPredatorBiochemistryEcology, Evolution, Behavior and SystematicsGeneral Medicine

摘要: DIMBOA (2,4-dihydroxy-7-methoxy-1,4-benzoxazin-3-one), a secondary metabolite found in cereal extracts, confers resistance wheat to aphids. Its effect on beneficial organisms was tested larvae of the aphid predatorEriopis connexa Germar. Larvae were fed until pupation artificial diets which different concentrations (2–200μg/g diet) added, as well aphids that had been feeding seedlings with levels (140–440 μg/g fresh tissue). In diets, greatest survival third-instar and duration second fourth instars. When provided food, those cultivar an intermediate level led significantly longer larval predator than did either low or high cultivars. Shortest development times obtained prey seedlings. Higher plant appear reduce rates (and ingestion), decreasing minimizing toxin predator.

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