Patent ID: 7316190

Claim:
A method for applying fumigant under plastic mulch planting beds comprising: a. attaching two opposing armature system adjustably to a tool bar of a tractor at an angle to permit fumigation of a plastic mulched planting bed without disturbing said plastic mulch wherein said armature systems include a main arm assembly, a hub and spindle assembly, a close wheel assembly and a fumigant dispersal assembly wherein said fumigant dispersal assembly includes a knife and blade, b. adjusting said armature system to plant bed width, c. operatively attaching a fumigant tank to a blunt tipped knife having attached to its inner side, at about a ninety degree angle, a beveled fumigant injection blade; wherein said knife and blade include a feed tube with an opening for fumigant dispersal, and d. moving said tractor over a raised, plastic mulched bed while applying fumigants under a plastic covering of said raised, plastic mulched bed below a soil surface under said plastic covering wherein said knife and blade inject fumigant into said soil from both sides of said bed.