Some diseases, including red thread, dollar spot and rust, develop due to a lack of nitrogen. It is important to maintain a fertility balance to reduce the development of any lawn disease. Recycle lawn clippings by leaving them on the lawn after mowing. This helps maintain fertility and may suppress some lawn diseases. Manage thatch and soil compaction.
Excessive thatch creates an excellent environment for diseases as well as for insects.
Dethatch or core aerate in spring or fall to manage thatch. IPM begins with using correct cultural practices and other methods to produce a dense, vigorous lawn. A healthy lawn will be able to resist invasion from pests and reduce the need for unnecessary pesticide and fertilizer applications. For more information on aspects of lawn maintenance see the additional Cooperative Extension System fact sheet references listed below. University of Connecticut Cooperative Extension Horticulture Fact Sheets are available from Connecticut Cooperative Extension Centers statewide.