“…Plants are a good potential source of such compounds, since many plant species have a defense mechanism and produce secondary metabolites in order to survive in the ecosystem. The plant families Asteraceae (Chiasson et al, 2001;Gonzalez-Coloma et al, 2005), Milliaceae (Gupta and Misra, 2006;Prasad et al, 2006;Sharma et al, 2006), and Apiaceae (Kang et al, 2006) are known to have insecticidal constituents. In sunflower, it was demonstrated that feeding damage of the plant by sunflower beetle Zygogramma exclamationis induced coumarin biosynthesis.…”