Coated pesticidal matrices, a process for their preparation and compositions containing them

A process for the preparation of a coated pesticidal matrix which process comprises:

• a) preparing an aqueous mixture comprising a pesticidal agent, a pH-dependent polymer, optionally a plasticizer, optionally an ultraviolet protector, optionally an activity enhancer, optionally a glidant, and water, provided that the pH of the aqueous mixture is below the solubilization pH of the pH-dependent polymer;
• and
• b) drying the aqueous mixture of step (a) to produce the coated pesticidal matrix.