NOVELTY - Formulation comprises mixture of (a) matrix being monomelic, dimeric, multimeric, oligomeric or polymeric backbone, and further being acidic or basic in nature, branched or linear, crosslinked or non-crosslinked and may exist in a free form or covalently linked, mixed with, and/or grafted with neutral components comprising polyethylene glycol, propylene glycol, or fatty acid condensates, (b) bioactive substance imbedded or trapped within the matrix and contains at least 8 weight/weight% of the formulation and (c) 0-40 wt.% of additive or modifier.    USE - The formulation is used as granules, suspension, emulsion in sprays, foams, coats for seeds or fertilizer for plants for preventing pest and used for foliage, soil, irrigation water, construction material, seeding material, grains and buildings.    ADVANTAGE - The formulation is inexpensive, environmentally-friendly, has sustained release property and can be stored for long period of time.    DETAILED DESCRIPTION - Formulation comprises mixture of (a) matrix being monomelic, dimeric, multimeric, oligomeric or polymeric backbone, and further being acidic or basic in nature, branched or linear, crosslinked or non-crosslinked and may exist in a free form or covalently linked to, mixed with, and/or grafted with neutral components comprising polyethylene glycol, propylene glycol, or fatty acid condensates, (b) bioactive substance imbedded or trapped within the matrix and constitutes at least 8 weight/weight% of the formulation and (c) 0-40 wt.% of additive or modifier or (a) matrix containing one or more combination of alkylamine, alkylacid, reaction product of carboxylic acid, carboxylic anhydride, and/or ester, and/or fat with the primary or secondary amino functions of an amino compound, and/or the hydroxyl functions of an amino alcohol, (b) bioactive substance imbedded or trapped within the matrix and (c) one or more additives or modifiers (0-95 wt.%) with respect to total weight of the composition. INDEPENDENT CLAIMS are included for the following:    (1) matrix comprising molar ratio of carboxylic functions and amino compound is greater than or equal to 1;    (2) carboxylic acid may or may not contain hydroxyls and/or oligoethylene or propylene oxides;    (3) method (M1) of formulating pesticide, involves grinding dried mixture to an average particle size of 0.2 mm or less in diameter; and    (4) method (M2) for preparing the formulation, involves mixing bioactive substance with matrix and/or additive, melting obtained mixture, and processing the obtained mixture.