title: Potent limonoid insect antifeedant from Melia azedarach.
abstract: Systematic fractionation of a fruit extract from Argentine Melia azedarach L., which was monitored by an insect antifeedant bioassay, led to the isolation of meliartenin, a limonoid antifeedant, which existed as a mixture of two interchangeable isomers. At 4 microg/cm2 and 1 microg/cm2, the isomeric mixture was as active as azadirachtin in strongly inhibiting the larval feeding of Epilachna paenulata Germ. (Coleoptera: Coccinellidae) and the polyphagous pest, Spodoptera eridania (Lepidoptera: Noctuidae), respectively.
mesh_terms: D000818:Animals; D001118:Argentina; D002851:Chromatography, High Pressure Liquid; D001517:Coleoptera; D005247:Feeding Behavior / Q000187:drug effects; D007536:Isomerism; D036701:Limonins / Q000737:chemistry / Q000302:isolation & purification*; D031586:Melia azedarach / Q000737:chemistry*; D019906:Nuclear Magnetic Resonance, Biomolecular; D009904:Optical Rotation; D010572:Pest Control, Biological; D010936:Plant Extracts / Q000737:chemistry / Q000302:isolation & purification; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D018411:Spodoptera
chemical_list: D036701:Limonins; D010936:Plant Extracts