Plant-Parasitic Nematodes in Managed Golf Course Greens throughout Canada
Plant-parasitic nematodes (PPN) feed on the roots of plants, reducing the uptake of nutrients and water. Accurate identification and quantification of PPN populations and understanding the population dynamics are key to managing these destructive pests in golf greens. This research was conducted to compare two nematode extraction techniques, identify the genera of PPN present on golf greens throughout Canada, determine conditions that influence PPN populations, and identify effective low-risk nematicides. Five predominant nematode genera were present in Canadian golf greens: Meloidogyne, Heterodera, Tylenchorhynchus, Helicotylenchus and Criconemoides, all of which were more effectively extracted using the sugar centrifugation technique. Golf courses in coastal cities had higher populations than those that were inland and greens established over 20 years ago had more PPN than newer greens. Some of the variation in PPN populations could be explained by soil properties and management techniques. None of the nematicides tested effectively reduced nematode populations.