An isolated nucleic acid molecule encoding a 7-epizingiberene synthase, a chimeric gene comprising the nucleic acid molecule, vectors comprising the same, as well as isolated 7-epizingiberene synthase proteins themselves, are provided. In addition, transgenic plants and plant cells comprising a gene encoding a 7-epizingiberene synthase, optionally integrated in its genome, and methods for making such plants and cells, are provided. Especially Solanaceae plants and plant parts (seeds, fruit, leaves, etc.) with enhanced insect pest resistance are provided.