Situation: Formerly known as Ophiobolus patch, Take-all patch is a disease of cool season turf particularly Bentgrass.
Turf Damage: Initial patches often resemble fusarium patch; however, they continue to develop after fusarium has ceased in late spring. Patches can range from 10cm to an area covering three metres.
Occurrence: Most severe in cool wet years on poorly drained irrigated turf. Patches often occur after fumigation in areas of low nitrogen fertility and/or high pH.