Recently nano molecules obtained by nanotechnology; there is possibility manipulation on nano scale level,regulate and catalyzed on chemical reactions by these structures. Nano materials are composed of components with very small size, and these components have impacts on the properties of materials at the macro level. Nan particles can serve as ‘magic bullets’, containing herbicides, chemicals, or genes, which target particular plant parts to release their content. Nan capsules can enable effective penetration of herbicides through cuticles and tissues, allowing slow and constant release of the active substances