The Effect of Phosphite Treatments on the Growth and Disease Susceptibility of Agrostis stolonifera L.
Dempsey, J. J. and Owen, A. A. G. (2010) The Effect of Phosphite Treatments on the Growth and Disease Susceptibility of Agrostis stolonifera L. In: 2nd European Turfgrass Society Conference, Angers, France, 11th -14th April 2010. [Unpublished]
Publisher's URL: http://angers-2010.turfgrasssociety.eu/view.php?p=...
Nutrition and disease control are two essential areas of fine turf management. The application of phosphite (H3PO3) to turf surfaces has been suggested as a means to reduce susceptibility to fungal diseases and to improve turf quality. The aim of this study was to measure changes in quality, growth and disease resistance of an Agrostis stolonifera L. sward following applications of phosphite. Agrostis stolonifera L. trial plots were established in a controlled environment greenhouse and on Curragh Golf Course, Ireland. Three phosphite treatments were applied: 0.35g/m2, 0.525g/m2, 0.70g/m2 and compared with equivalent rates of phosphate and control plots. Growth, turf quality and Microdochium patch (Microdochium nivale) occurrence were assessed monthly for all plots over one growing season. No significant differences in growth between phosphite and phosphate treated plots was recorded. Phosphite treated plots had significantly greater turf quality (p<0.01) and significantly less Microdochium patch occurrence (p<0.01) than the phosphate and the control plots. Phosphite applications, while not effective as a turfgrass fertiliser, significantly improved turfgrass quality and reduced disease occurrence so could potentially be an important addition to an integrated management approach to reducing plant protection chemical inputs whilst maintaining surface quality.
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