gum etc present in 1 15 parts preferably 2 10 parts i c one or more surfactants soluble or dispersible in water that allow the later emulsification of the oil phase in the water phase present in 1 10 parts preferably 2 5 parts a special emulsifier for doing the emulsion and to obtain a reduced particle size are the block coplymers ethoxylated propoxylated much more effective if they are only ethoxylated or only propoxylated i d a catalyst of the polymerization reaction suitable for the compounds wf 2 2 a and b preferably para toluensulfonic acid p tsa for the reaction of the glycoluril compounds and optionally amines polyamines functionalized polyamines polyols in order that they help in the reaction of the urea resins one of the distinctive aspects of the present invention is that it is not necessary the use of an amine or a polyol for the formation of the polyurea groups rather in our process we use the own reactivity of the wall forming materials urea resins with water for autocatalysis this way the reaction is better controlled and slowe apart from being absolutely novel this combination of catalysts and reactants for the formation of the microcapsule 39 s wall i e optionally other coformulants among them it is recommended emulsifiers and or dispersants for the correct emulsification performed by the farmer in the spray tank ph adjusters e g phosphoric acid ascorbic acid in the amount needed to reach the ph in which the reaction takes place ph 4 6 normally with due account of any other catalyst that may be present antifoam antimicrobians antioxidants and uv protectors the compounds i e normally should not be over 5 parts in the formulation it is understood that.