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Take-all Patch — Gaeumannomyces graminis f.sp. avenae
© 2012 MSU Plant Pathology
© 2012 MSU Plant Pathology
© 2012 MSU Plant Pathology
Take all patch is an important disease on bentgrass, particularly newly established stands of creeping bentgrass turf. The disease first appears in late spring or early summer, as a patch of bronze or bleached turf. The center of the patch eventually dies and is can give rise to weeds, particularly annual bluegrass. Spots range from 4-6 in. (10-15 cm) in diameter at first, but may grow into large patches, several feet in diameter over a period of years. Plants affected have shallow root systems, and are easily pulled out of the ground. Black runner hyphae of the fungus can be observed on crowns and roots microscopically.
The pathogen can survive on thatch and dead tissue as dormant mycelium. The fungus attacks crown and root tissues of the plant during the cool, wet weather of the spring and fall. It is most severe on newly established creeping bentgrass turfs. Development can be favored by applications of lime and by high soil pH.
Take all patch is an important disease on bentgrass, particularly newly established stands of creeping bentgrass turf. The disease first appears in late spring or early summer, as a patch of bronze or bleached turf. The center of the patch eventually dies and is can give rise to weeds, particularly annual bluegrass. Spots range from 4-6 in. (10-15 cm) in diameter at first, but may grow into large patches, several feet in diameter over a period of years. Plants affected have shallow root systems, and are easily pulled out of the ground. Black runner hyphae of the fungus can be observed on crowns and roots microscopically.
The pathogen can survive on thatch and dead tissue as dormant mycelium. The fungus attacks crown and root tissues of the plant during the cool, wet weather of the spring and fall. It is most severe on newly established creeping bentgrass turfs. Development can be favored by applications of lime and by high soil pH.
Also Known As...
- Location:
» Golf Course
- General Symptoms:
» Circle, Patch, Wilted, Irregular
- Foliar Symptoms:
» Yellow, Brown
- Time of Year:
» May, Jun, Jul, Aug, Sep, Oct
- Irrigated:
» Yes, No
- Hosts:
» Creeping Bentgrass, Colonial Bent, Annual Ryegrass, Velvet Bentgrass
Proper nitrogen fertility is important in managing take-all patch. Urea-based fertilizers tend to be effective in managing the disease when applied at adequate levels to creeping bentgrass turf stands. Liming should be avoided in areas where take-all is a problem. Soil pH should be below 6.5, preferably between 5.5 and 6.0. Manganese deficiency has shown to greatly enhance take-all patch development, therefore adequate manganese fertility should be practiced depending on soil and tissue analyses. Excessive irrigation should be avoided as well.
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- Chemical Control of Turfgrass Diseases 2011
University of Kentucky College of Agriculture
Turfgrass hosts include, but are not limited to: Creeping bentgrass, colonial bentgrass, velvet bentgrass.
