A method for treating the soil adjacent to a structure, comprising dichoproceding: placing an injection apparatus (12) on a first injection site (96) generally adjacent to a structure； operating the injection apparatus to inject a plurality of discrete high-pressure streams of pesticide into the soil at said first injection site, said operation stage being performed without prior disturbance of the soil at said first injection site and at least one of the discrete streams (106) of pesticide are generally injected vertically into the ground and at least one other discrete stream (108) of pesticide is injected differently than vertically into the ground； moving the injection apparatus over a second injection site (96) at least in a different part of the dichoprimer injection site, and generally adjacent to the structure； and operating the injection apparatus to inject a plurality of high pressure and discrete streams of pesticide into the soil at said second injection site, said operation stage being performed without prior disturbance of the soil at said second injection site and at which less one of the discrete streams of pesticide is generally injected vertically into the ground and at least one other discrete stream of pesticide is injected differently than vertically into the ground.Un procedimiento para tratar el suelo adyacente a una estructura, comprendiendo dichoprocedimiento: colocar un aparato de inyección (12) sobre un primer sitio de inyección (96) generalmente adyacente a unaestructura； operar el aparato de inyección para inyectar una pluralidad de corrientes a alta presión, discretas de pesticida haciael suelo en dicho primer sitio de inyección, estando dicha etapa de operación realizada sin perturbación previa delsuelo en dicho primer sitio de inyección y en el que al menos una de las corrientes discretas (106) de pesticida seinyecta en general en vertical hacia el suelo y al menos otra corriente discreta (108) de pesticida se inyecta de formadiferent
