Solid moss control composition

Abstract

A method of controlling moss by applying to grass infested with moss a dry composition including: a) a source of nitrogen such as isobutylenediurea or methylene urea; b) a non-ionic surfactant or wetting agent; c) a metal containing salt, and d) an acidic pH adjusting agent effective to adjust the pH of the composition to a pH of between 2.5 and 5 when wetted on grass. The dry composition may be a granular composition, and may be applied by broadcasting over a large area.

1 . A method of controlling moss, comprising applying to grass infested with moss a dry composition comprising:
 a. a source of nitrogen,   b. a non-ionic surfactant or wetting agent,   c. a metal containing salt, and   d. an acidic pH adjusting agent effective to adjust the pH of the composition to a pH of between 2.5 and 5 when wetted on grass by normal amounts of rain or watering.   
     
     
         2 . The method of  claim 1  wherein the metal containing salt is a metal sulfate, a metal phosphate, or a metal halide. 
     
     
         3 . The method of  claim 2  wherein the metal containing salt is a metal sulfate. 
     
     
         4 . The method of  claim 3  wherein the metal sulfate is selected from the group consisting of copper sulfate, zinc sulfate, iron sulfate, and iron chloride. 
     
     
         5 . The method of  claim 1  wherein the metal containing salt is applied in an amount of 20 to 50 ounces by weight per 1000 square feet of treatment area. 
     
     
         6 . The method of  claim 1  wherein the pH-adjusting agent comprises a member selected from the group consisting of hydrochloric acid, phosphoric acid, citric acid, acetic acid, and tartaric acid. 
     
     
         7 . The method of  claim 1  wherein the dry composition is a granular composition. 
     
     
         8 . The method of  claim 1  wherein said applying is by broadcasting.