Patent ID: 8461082

Claim:
A method of preparing a spray tank mix of glyphosate for application to plants from a spray tank, the method comprising the steps of: (a) providing a two pack formulation system comprising (i) a pack of a glyphosate acid concentrate in the form of solid particulate material of particle size in the range 0.1 mm to 5 mm said concentrate composition comprising at least 80% by weight glyphosate acid and (ii) a pack of a water soluble alkaline composition comprising an alkanolamine and a surfactant; (b) providing a spray tank for spray application to plants; (c) diluting the alkaline composition with water in the spray tank to provide a diluted alkaline mixture comprising alkanolamine and surfactant; (d) forming an aqueous dispersion of the particulate glyphosate acid concentrate by mixing; (e) adding the mixed aqueous dispersion of particulate glyphosate acid to the dilute alkaline mixture to thereby react therewith and form an alkanolamine salt of glyphosate in situ in the spray tank; and (f) optionally adding further water to the spray tank to provide the spray tank mix of alkanolamine salt of glyphosate for application to plants from the spray tank wherein the spray tank mix comprises in the range of from 0.1 to 9.0% by weight glyphosate salt based on glyphosate acid equivalent.