... guards against the cockspur grass, the green bristlegrass, the crabgrass, the goosegrass, annual meadow grass, dentes foxtail, the hard grass, the rice flatsedge, the wild millet, and the para ... guard against natural grasses, such as the dayflower, the amaranth, the purslane, the goosefoot, the redlegs, the black nightshade, the Chinese dodder, the Chrysanthemum cyperus rotundus linn, and the thorn ...