LAUSR

In Martinique Helicoverpa Zea is a common pest of tomato responsible for significant economic losses. To fight against H. zea proliferation and damages corn could be used as a trap crop since H. zea larvae growth in the corn silk was inhibited by the presence of some flavonoids. However, only some corn varieties show an efficient inhibitory activity against H. zea depending on their flavonoid composition. In order to be able to select corn varieties with a promising inhibition potential to be tested as trap plant, a metabolomic approach was developed to compare the flavonoid composition of corn silks from resistant and no resistant varieties. The quantitative analysis using UHPLC/TQ MRM MS associated to statistical treatments allowed to determine the most concentrated and the discriminant flavonoids of the resistant Java variety that clearly stood out presenting a higher content in several C-glycosyl-O-glycosyl luteolin and apigenin derivatives such as maysin molecule.