Abstract: A method of delivering an agricultural composition to a plant including determining a dose of the agricultural composition required to deliver a treatment effective amount of the at least one agrochemical agent to a target soil depth using a computational model, the agricultural composition including a plurality of plant viral nanoparticles (VNPs) and/or virus-like particles (VLPs) and at least one agrochemical agent, and applying the determined dose of the agricultural composition to the plant.

Abstract: An agricultural composition includes a plurality of rod-shaped plant viral nanoparticles (VNPs) and/or virus-like particles (VLPs), each VNP and/or VLP having an exterior surface and an interior surface that extend from a first end to a second of the rod-shaped VNP and/or VLP, the interior surface defining a channel that extends through rod-shaped VNP from the first end to the second end; and at least one agrochemical agent attached or conjugated to the interior and/or exterior surface of the rod-shaped plant VNPs and/or VLPs.