A method of controlling the release rate of an agricultural active ingredient from a seed that has been treated with that active includes providing a seed that has been treated with the active ingredient, applying to the treated seed a film that includes an emulsion of a polymer in a liquid in which both the agricultural active ingredient and the polymer have low levels of solubility, and then curing the film to form a water insoluble polymer coating on the surface of the treated seed. Seeds that have been treated by this method are also provided.
一种控制农用活性成分从用该活性成分处理过的种子中释放速率的方法包括:提供一粒用该活性成分处理过的种子,在该处理过的种子上涂抹一层薄膜,该薄膜包括聚合物在液体中的乳液,在该液体中农用活性成分和聚合物的溶解度都很低,然后固化该薄膜,在该处理过的种子表面形成一层不溶于
水的聚合物包衣。还提供了用这种方法处理过的种子。