Biological activity of secondary plant substances glucosinolates, alkaloids and saponins, expressed by their effects on development of colorado potato beetle, Leptinotarsa decemlineata say

alcaloides alkaloids antifeedants application rates botanical insecticides brassica napus comportement alimentaire dose d'application egg incubation experimentation feeding habits gain de poids ganancia de peso glucosinolate glucosinolates glucosinolatos graine inhibidores del apetito insecte phyllophage insecticidas de origen vegetal insectos depredadores de las hojas larvae larvas larve leaf eating insects leptinotarsa decemlineata lupinus angustifolius medicago sativa mortalidad mortalite mortality saponinas saponine saponins seeds semilla solanum tuberosum weight gain