Date of Award
Master of Science
Establishing and maintaining a vigorous disease-free turf represents a multimillion dollar industry in the United States. $2,892,800,000.00 are spent every year in growing and maintaining an estimated 13,450,100 acres of turf. These figures illustrate the current emphasis placed on turf production.
Turfgrasses are grown for landscape and recreational purposes generally under conditions which are more severe and restrictive than for grasses growing under natural conditions. For example, defoliation and heavy fertilization result in plants which essentially never mature and remain more succulent and predisposed to disease. Soil compaction is another severe problem on areas of recreational turf. It may increase disease by creating conditions of high soil moisture and poor soil aeration. Other factors, such as high density plantings of a single turfgrass species and intensive use of herbicides, insecticides and fungicides, result in reduced vigor which may also predispose turf to disease.
Iowa State University Digital Repository
Markland, Flave Eugene, "Influence of nitrogenous fertilizers on disease incidence in Agrostis palustris" (1965). Retrospective Theses and Dissertations. 17359.