An analyte test sensor for use in measuring the concentration of a particular analyte in a test sample includes a non-conductive substrate, a reference electrode deposited on the substrate, a working electrode deposited on the substrate and a compensation electrode deposited on the substrate. The actuator includes magnetic field sources arranged on both sides of the magnetic field sensor, the magnetic field sensor and the magnetic field sources being arranged so that magnetic field lines generated by the magnetic field sources pass through the magnetic field sensor. The first and second surfactants exhibit a synergistic interaction in enhancing herbicidal activity of the glyphosate herbicide.