Abstract: A biological method for either controlling or eliminating yellow nutsedge in agricultural fields is disclosed. An agricultural field which contains yellow nutsedge is inoculated with a sufficient amount of an effective strain of rust fungus Puccinia canaliculata and a carrier to an epidemic. As a result of reducing competition from the yellow nutsedge and inhibiting reproduction, the yellow nutsedge is either controlled or eliminated. Best results occur when the agricultural field is inoculated in the spring of the year. Application methods include: spraying, granular, irrigation, wind-carried, or air-dropped.

Abstract: A foldable traffic warning cone utilizes a first panel of generally fan shape having triangular faces joined at adjacent sides along face folding lines. The first panel has opposite free sides which interconnect to fold the first panel into an upright polygon. The triangular faces of the first panel have bottom ends with extending flaps which cooperate with a second panel having a number of sides commensurate to the number of faces on the first panel and which forms a base for the first panel. The second panel has wings extending outwardly from each of the sides and which are foldable to provide a wall extending about the base. The wings also trap the flaps and thereby connect the upright polygon and the base together. The warning cone can be selectively folded and unfolded for use and storage.