Control of the plant, when desired, is best managed via mechanical means, such as hand pulling and hoeing, preferably followed by sowing of native plants. Animals rarely graze it because of its irritating hairs, and liquid herbicides require surfactants to be effective, as the hair causes water to roll off the plant, much like the lotus effect. Burning is ineffective, as it only creates new bare areas for seedlings to occupy. "G. tetrum" and "Cucullia verbasci" usually have little effect on "V. thapsus" populations as a whole. Goats and chickens have also been proposed to control mullein. Effective (when used with a surfactant) contact herbicides include glyphosate, triclopyr and sulfurometuron-methyl. Ground herbicides, like tebuthiuron, are also effective, but recreate bare ground and require repeated application to prevent regrowth.