Fuente: WIPO "essential oil or extracts" Some embodiments are directed to a system for a formulation of nanoparticles used for protecting plants from pests while promoting plant growth. The system includes a solution with a filler, an extender, a wetting agent, a disintegrant, or a surfactant, and nanoparticles with spherical layers in the solution. The nanoparticles contain a spherical liquid core layer comprising a pesticidal active ingredient, a spherical first layer comprising chitosan, the spherical first layer wrapping the spherical liquid core layer and located directly on the spherical liquid core layer, a spherical second layer comprising a fertilizing active ingredient, the spherical second layer wrapping the first spherical layer, and a spherical final layer comprising chitosan, the spherical final layer being the outermost spherical layer of the nanoparticle. The formulation is applied to an environment, and the pesticidal active ingredient and the fertilizing active ingredient are released into the environment.