Squidge

An algal infestation (e.g. of Nostoc species) on the surface of wet turf, especially during cold weather, in low light levels, in areas of poor air movement and during the winter. Compacted turf and surfaces with moisture retentive thatch are particularly prone to this algal growth, and where it occurs on embankments this is a hazard, risking slips and falls, as well as being unsafe for operatives of pedestrian and ride-on machines. Gently sloping surfaces which encourage surface run-off rather than allowing for rapid run-off or adequate vertical infiltration, especially in shaded areas, can also be subject to squidge infestation.

To reduce and alleviate the problem, the surface must be scraped of the algae, along with other actions to improve surface and soil conditions, especially in creating a drier surface. This might include initial light forking, slit tining, and raking if conditions are appropriate, as well as a light sand application, and when conditions are more suitable a deeper spiking. Improving air circulation by thinning of adjacent hedges, shrubberies or trees might be considered, and checking soil nutrient and pH status to determine if these are suitable for optimum grass competitiveness for the given situation.