Syngenta technical manager Dr Simon Watson said when turf growth stops, it puts the plant under increased stress and with greater susceptibility to disease.
Disease infection also has the chance to develop without growing out and being mown off - which can result in serious scarring and loss of surface smoothness.
"An application of Medallion TL when there is a risk of Fusarium Patch attack can give long-lasting control during cold, slow growing conditions," he advised.
"It’s especially important to protect turf quality now, with little chance of recovery from damage until growth picks up later in the spring."
"Getting a higher proportion of spray down to the base of the plant will further help to target disease pathogen in the thatch and fully utilise the activity of Medallion TL. Furthermore, the Syngenta Turf nozzles can help to significantly reduce the risk of drift, so more of the product hits the intended target," added Dr Watson.
"Applying the right product, at the right time and in the right place, is the key to getting the longest lasting results and maintaining the best possible turf quality."