A method for regulating the release rate of microencapsulated actives comprising: 1a) addition or subtraction of piperonylbutoxide (PBO), component B) to 2a) formulations A) comprising at least one microencapsulated active having agrochemical activity, optionally PBO outside the microcapsule, 3a) dilution by water of component A) and/or component B) until the active application dose, the ratio by weight PBO/active ranges from 0.1 to 80, the PBO subtraction being feasible only when the PBO is present outside the microcapsule of the formulation A).
