Patent ID: 7540110

Claim:
A system for the delivery of insecticide, comprising: a shell adapted for placement around a trunk of a tree, the shell defining an annular tank, the shell having a segmented annular base comprising a plurality of base member segments and a plurality of shell wall members supported on the base, the base having a drain port defined therein, wherein each of said shell wall members has an elongated tongue extending along a first edge thereof and an elongated groove extending along an opposite second edge thereof, said shell wall members being joined together by tongue-and-groove joints formed when said tongues are snapped into said grooves, wherein each of the segments of said annular base has a top edge and an elongated groove defined in the top edge, said shell wall members being seated in the grooves formed in the top edges of the base member segments, and wherein each of the segments of said annular base has a lower edge attached to an upper edge of a fluid impermeable membrane, the membrane being adapted for wrapping around the tree trunk to form a fluid collecting recess in order to prevent the insecticide from penetrating ground surrounding the tree trunk; a rubber gasket disposed both in the elongated grooves defined in the top edges of the segments and between the shell wall members and the base member segments, the gasket forming a fluid-tight seal; and a pump having a first fluid conduit connected to the drain port and a second fluid conduit adapted for pumping a liquid insecticide into a top end of the annular tank, the pump being operable in an oscillating pulsed mode for causing the insecticide to penetrate bores in the tree formed by insect pests, the pump recirculating insecticide through the annular tank at a user-selectable frequency.