The alkaloids of Lupinus mutabilis Sweet. and its use in the weed control

Allelopathy is described as the positive or negative effect that one plant causes on growing of another, which occurs through reléase chemical components to environment. The 'tarwi', Lupinus mutabilis Sweet., a native legume from Andean region whose seeds have high protein content, however, these bitter taste due presence alkaloids, metabolites been reported allelochemical components, uses in agriculture are being investigated. Laboratory experiments were conducted determine 5 concentrations (0, 1.55, 3.10, 4.65 and 6.20 mg mL-1) aqueous extract tarwi alkaloids germination growth vitro seedlings three species weeds; Amaranthus dubius, Bidens pilosa Medicago polymorpha, percentage, radicle hypocotyl lengths evaluated. An inversely proportional relationship between evaluated for all was considered, having A. dubius M. polymorpha seedling most affected. significant reduction occurred at above mL-1.