NOVELTY - Polymeric material for release of compound of interest, comprises polymeric matrix material, second polymeric material incorporated in the polymeric matrix material, and the compound of interest incorporated in the polymeric matrix material, where the polymeric matrix material is hydrophobic polymeric material and the incorporated second polymeric material is a hydrophilic polymeric material, or the polymeric matrix material is a hydrophilic polymeric material and the incorporated second polymeric material is a hydrophobic polymeric material.    USE - The polymeric material is used for releasing compound of interest including fertilizer, nutrient, soil amendment, mineral, plant growth hormone, plant growth regulator, pheromone, kairomone, allomone, repellent or pesticide for protecting plant or plant portion from infestation by pest or disease species, regulating plant growth or destroying infected plant or plant portion. The method is useful for remediating existing infestation of the plant or plant portion. The polymeric material includes fiber, filament, non-woven fabric, film, coating, pellet, capsule, plastic, powder, granule, gel or droplet, preferably fiber, film or powder. The pesticide includes acaricide, algicide, avicide, bactericide, fungicide, herbicide, insecticide, mating disrupter, molluscicide, nematocide, rodent repellent or virucide. The plant portion includes root, seed, bulb, corm, rhizome, tuber, leaf, flower, fruit, reproductive structures, bud, stem, bark or foliage. (all claimed).    ADVANTAGE - The polymeric material is cost-effective, non-toxic, biodegradable, eco-friendly, has controlled release property, and can be obtained by simple process.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for the following:    (1) chemical delivery system for controlled delivery of a compound of interest comprises the above polymeric material;    (2) preparing a polymeric material for release of a compound of interest, involves (a) preparing a solution of the polymeric matrix material, (b) suspending or dissolving the second polymeric material in the solution, (c) suspending or dissolving the compound of interest in the solution, and (d) preparing polymeric material by subjecting the solution comprising the polymeric matrix material, the suspended or dissolved second polymeric material and the suspended or dissolved compound of interest to electrospinning, wet spinning, dry spinning, dry-jet wet spinning, melt spinning, gel spinning, electrospraying, casting, spray draying, aerosolizing, atomizing, monodispersing, melt blowing, molding, pressing, curing, or extruding;    (3) protecting plant or plant portion from infestation by a pest or disease species, involves (d) adhering the polymeric material to the plant or plant portion, or (e) applying the polymeric material directly onto or into the substrate in which the plant or plant portion is disposed, where the polymeric material comprises a compound of interest chosen from pheromone, allomone, kairomone, repellent and pesticide;    (4) protecting a plant or a portion thereof from infestation by a pest or disease species;    (5) method for controlled release of a compound of interest into a desired location, involves contacting the polymeric material to the desired location;    (6) regulating plant growth involves applying the polymeric material onto the plant or plant portion, where the polymeric material comprises a compound of interest including plant growth regulator e.g. phytohormone; and    (7) destroying plant or plant portion, involves applying the polymeric material of the plant or plant portion, where the polymeric material comprises a compound of interest including herbicide.