Magazine article Landscape & Irrigation

Take-All Patch

Magazine article Landscape & Irrigation

Take-All Patch

Article excerpt

What does it look like?

Take-all patch is caused by the root-infecting, soilborne fungus Gaeumannomyces graminis var. graminis, a serious disease that has the potential to destroy large amounts of turfgrass and has proven to be very difficult to control.

Symptoms of take-all patch are most prevalent in late spring, first appearing as small, water-soaked areas of turf. As the disease progresses, yellowing circular or irregular-shaped areas continue to spread up to two feet in diameter. Generally, these patches form a circular pattern as the fungus grows outward. Diseased plant roots become so brown, rotted and damaged that the stolons are easily removed from the ground.

Host material and range

Cool, moist conditions favor take-all patch infections. In the northern United States, bentgrass is highly susceptible, and, therefore, golf course putting greens and bentgrass fairways are most likely to suffer from the disease. Some bluegrasses and rescues may become injured, however these turf species most often survive as they do not typically sustain serious infection. In the South, take-all patch infects St. Augustinegrass and in some cases can also damage Bermudagrass. During the summer months, when turf is particularly stressed and weak, infected turf will continue to decline.

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Current threat

If left uncontrolled, take-all patch has the potential to destroy large amounts of turfgrass. Regrowth in infected areas is extremely slow and often unsuccessful, as the new growth quickly becomes re-infected. …

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