Although modern varieties of bentgrass are less susceptible to common diseases than Poa annua, there is a relatively high risk of damage from a disease called Take-All Patch (Gaeumannomyces graminis) on new stands of turf. Typically this risk is minimized after full establishment, but preventative management is required in the first several years.
Take-All is a fungal pathogen that produces black/brown mats of growth just beneath the surface of the soil that can damage or kill the roots of the affected plants. Best management practices include aeration and the use of fungicides at the correct time of year. This morning, our staff completed the fungicide treatment on all playing surfaces which were established by seed last fall. This treatment will be repeated each spring and fall when the soil temperatures are in the mid-sixties until the risk of Take-All is gone (about three years). Because this is a soil borne pathogen, water is applied move the fungicide into the soil.