Patent ID: 7774978

Claim:
A method of controlling the release rate of an agricultural active ingredient from a seed treated with the active ingredient, the method comprising the steps of: providing a seed that has been treated with an agricultural active ingredient; applying to the treated seed, at a temperature of about 34° F. (about 1° C.), an aqueous emulsion of a polymer latex, wherein the polymer latex has a solubility in water at 25° C. of less than 5% by weight, a glass transition temperature of about 15° C. to about 40° C. and wherein the active ingredient has a solubility in water at 20° C. of less than 10 g/L; and curing the polymer latex emulsion to form a water insoluble, non-migrating polymer coating on the surface of the treated seed, wherein the polymer coating that is formed from the polymer latex emulsion has a glass transition temperature within the range of from about 15° C. to about 40° C., thereby providing a coating which retards the release rate of the agricultural active ingredient from the seed.