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'''Typhula blight''' is a [[fungal disease]] that affects [[turfgrass]], particularly in cold, wet conditions. It is caused by the [[fungus]] species ''Typhula incarnata'' and ''Typhula ishikariensis'', which are members of the [[Typhulaceae]] family. The disease is also commonly known as [[snow mold]], due to its tendency to develop under snow cover.

== Symptoms and Identification ==

The primary symptom of Typhula blight is the appearance of irregularly shaped, straw-colored patches on the turf. These patches can range in size from a few inches to several feet in diameter. The grass blades within the patches may be covered with a cottony, white [[mycelium]] that is most visible when the turf is wet.

In addition to the visible symptoms, Typhula blight can be identified by the presence of small, round [[sclerotia]] on the infected grass blades. These sclerotia are the survival structures of the fungus, and they can be either red-brown (''Typhula incarnata'') or black (''Typhula ishikariensis'').

== Disease Cycle ==

The Typhula blight disease cycle begins when the sclerotia germinate in response to cold, wet conditions. The resulting mycelium infects the turfgrass, causing the visible symptoms of the disease. The fungus continues to grow and produce new sclerotia throughout the winter, under the protection of the snow cover.

When the snow melts in the spring, the sclerotia remain on the turf and in the soil, where they can survive until the next winter. The disease can therefore recur year after year, unless effective control measures are implemented.

== Management and Control ==

Management of Typhula blight involves a combination of cultural practices and [[fungicide]] applications. Cultural practices include maintaining a balanced [[soil pH]], avoiding excessive [[nitrogen]] fertilization, and removing snow from the turf as quickly as possible.

Fungicides can be used to control Typhula blight, but they must be applied before the snow cover forms. The most effective fungicides for this purpose are those that contain the active ingredients [[iprodione]], [[propiconazole]], or [[thiophanate-methyl]].

== See Also ==

* [[List of turfgrass diseases]]
* [[Snow mold]]
* [[Fungicide]]

[[Category:Fungal plant pathogens and diseases]]
[[Category:Lawn care]]
[[Category:Turfgrass diseases]]
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Typhula blight - Revision history

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