the lengths 11 passing through a central opening 38 therein the box 36 includes a spring loaded cover 37 which when opened permits access to the ends 27 of the several tube lengths 11 and when closed shields the same from the weather the mounting of one or more boxes 36 on the building exterior permits injection of pesticide into various zones of coverage without the need for the person applying the chemicals to gain entrance to the interior of the structure a lock not shown may optionally be provided on the box 36 to prevent unauthorized use thereof fig5 illustrates the construction of the perforations 22 along the tubing 11 the same are preferably made in the outer wall of standard tubing in the form of conical shaped apertures 22 that diverge outwardly at an approximately 25 u00b0 pitch for standard 1 8 inch od polyethylene tubing with an outside diameter of 0 125 inches and an inside diameter of 0 063 inches the apertures 22 are formed with a 0 063 inch diameter inner opening and a 0 125 inch diameter outer opening preferably using a diamond tipped razor blade 40 of triangular shape that contacts the tubing and rotates in a circle about a vertical axis to create a perforation 22 as the tubing is brought to a momentary halt after exiting from the extruder the finished product is then rolled into thousand foot or so lengths onto rolls for subsequent cutting at the job site as shown schematically in fig1 once the tubing lengths 11 and receptacles 20 are installed for the various zones of coverage the system can be serviced on a regular basis by a certified pest control technician who injects measured amounfts of a pesticide propellant into the exposed open.