An improved method of applying a chemical treatment agent to a wood structure characterized by the conventional steps of forming a hole in a wood object, and inserting a container enclosing the treatment agent into the hole. The improvement comprises sealing the container with a suitable closure means fabricated out of a material which undergoes an interaction with the chemical treatment agent or its vapors. When the sealed container carrying the chemical treatment agent is inserted within the prepared hole, and when the hole is thereafter plugged such that the sealed container is substantially confined within the wood structure, the treatment agent and/or its vapors degrade or dissolve the closure means thereby providing an opening through which the chemical agent and its vapors are released into the internal structure of the wood object.
An isothiocyanate vapor-generating agent containing a solution of an isothiocyanate dissolved in an oily liquid having a vapor pressure of 2 mmHg or less at 30.degree. C. A germ-desroying treatment method using vapors of an isothiocyanate and a germ-destroying treatment apparatus are also disclosed.
An insecticide composition preferably composed of approximately 79% petroleum jelly, 20% aluminium phosphide in powder form and 1% additive catalyst and method of application, is disclosed. The composition is applied to orifices made by insects which attack fruit bearing trees, particularly orange-tree borers. The composition is characterized by the release of phosphine gas upon its exposure to air.
A method for treating a tree comprises the steps of punching at least one hole in a trunk of a tree and injecting an individual chemical pellet directly into the at least one hole. The chemical pellet dissolves in and mixes with sap of the tree to treat the tree. A dispenser for injecting the pellets and a punch hammer for punching holes in the tree, both of which are used in the tree treating method, are also disclosed.
A tree treatment capsule is inserted into a bore formed in a tree and has several volumes from which various fluids used to treat the tree are sequentially discharged. The capsule includes a plastic container having a shank portion, with a first internal cavity having an end opening and containing a first chemical agent, and a head element integrally formed with the shank portion at a location remote from the end opening. The shank portion includes a circumferential recess formed therein, and a plastic plug is provided for sealingly closing the internal cavity. The plastic plug has an outer external diameter which is slightly smaller than the diameter of the end opening, and has another internal cavity formed therein containing a second chemical agent. The plug is partially insertable into the end opening so that a tight fit between the plug and the end opening is provided. The shank portion is broken to release the first chemical agent immediately as an impact force is applied to the head element and moves the head element towards the plastic plug. The plastic plug has another internal cavity formed therein containing a second chemical agent. The end plug is gradually broken down to release the second chemical agent after the first chemical agent has been released.
A capsule for insertion into a bore includes a hollow head section having a first diameter, a hollow shank, extending along a central axis of the capsule and having a second diameter smaller than the first diameter, interconnected with the head section by a hollow tapered transitional section, and a cap received within the head section. The cap defines, together with inner surfaces of the shank, the transitional section and the end face, a capsule volume for storing a chemical agent. The capsule is insertable into the bore so that when the capsule is inserted into the bore, the distal edge portion of the shank end face abuts an end wall of the bore. The shank is frangible so that when a force is applied to the head section, causing the head section to at least partly move into the bore, the distal edge portion translates the force into a stress which breaks the shank to release the chemical agent from the capsule volume. To assist it in breaking, the shank is provided with a groove extending around its circumferential exterior and dividing it into a first shank section, extending between the transitional section and the groove, and a second shank section, extending between the shank end face and the groove.
