A system and method for determining eligibility of persons and enrolling those persons in various programs. Particularly preferred applications include delivery adjacent to grape vine leaves in order to defoliate basal leaves and to kill localized insect pests, and by injecting superheated steam in strawberry beds prior to planting to kill nematodes. Each of the laminas is integrally formed with a pair of convexo-concave spacers that each project from a first face of the lamina and define a cavity in a second face of the same lamina. Such techniques may provide benefits in a variety of situations, including when the size of input datasets to be used by a program are large, and the transferring of data to andor from computing nodes may impose large delays andor monetary costs.