Turfgrass Diseases

Monica L. Elliott andPhilip F. Harmon

Monica L. Elliott andPhilip F. Harmon

Monica L. Elliott andPhilip F. Harmon

Philip F. Harmon andMonica L. Elliott

This document provides a key for the preliminary diagnosis of landscape turfgrass diseases, focusing on common issues in Florida. It includes sections on disease identification, pathogen details, affected turfgrasses, occurrence timing, symptoms, cultural controls, and chemical treatments. The key helps narrow down potential disease problems and offers links to more specific diagnostic resources. For unresolved issues, consulting local extension offices or submitting samples to diagnostic clinics is recommended. First published: July 1991.

Monica L. Elliott andPhilip F. Harmon

Philip F. Harmon andAaron J. Palmateer

[ABSTRACT]

Monica L. Elliott andPhilip F. Harmon

This document discusses the occurrence and management of large patch disease in warm-season turfgrasses, particularly St. Augustinegrass and zoysiagrass. It explains the conditions that trigger the disease, symptoms, and signs of infection. The article emphasizes cultural controls, such as nutrient and water management, and chemical controls, including various fungicides. It also highlights the importance of integrating cultural practices with chemical treatments for effective disease management and recovery of turfgrass. First published: May 1991.

Monica L. Elliott andPhilip F. Harmon

This document discusses the root rot disease affecting warm season turfgrasses, caused by the pathogen Gaeumannomyces graminis var. graminis. The disease is triggered by high rainfall and stressed turfgrass, leading to symptoms such as yellow patches and rotted roots. Cultural controls, including proper mowing and balanced nitrogen-potassium applications, are essential for managing the disease. Preventative fungicides can be used but are less effective once symptoms appear. The document emphasizes the importance of stress prevention and provides detailed guidelines for turfgrass management to mitigate the impact of the disease. First published: July 1994.

Philip F. Harmon

Mosaic disease of St. Augustinegrass was first reported in the 1960s in sugarcane producing areas of Palm Beach County, Florida. In the 10 years prior to 2013, less than 5 samples with mild symptoms were brought to the attention of the extension turfgrass pathologist. But in September 2013, an outbreak of the disease occurred in Pinellas County. Leaf symptoms included mosaic, but turned necrotic and the severe dieback that completely killed some infected lawns. In September 2014, lawns infected in 2013 and new lawns started dying in both Pinellas and Palm Beach Counties. Despite the similarity of symptoms to another St. Augustinegrass decline (SAD), as of November 2014, all samples have tested negative for SAD, and positive for presence of Sugarcane Mosaic Virus.

Monica L. Elliott andPhilip F. Harmon

A UF/IFAS numbered Management.