METHODS FOR CONTROLLING VEGETATION

摘要

Methods for controlling vegetation are disclosed which involve contacting the foliage of the vegetation with an aqueous solution containing urea and sulfuric acid. The molar ratio of urea to sulfuric acid preferably is within the range of about 1/4 to about 7/4 so that at least about 25 percent of the sulfuric acid is present in the solution as the monourea-sulfuric acid adduct. Methods for the selective control of undesired vegetation in seeded areas or in the presence of desired crop plants, nonselective methods of vegetation control involving the use of surfactant-containing solutions, and solid compositions suitable for producing the described aqueous solutions are also disclosed.