Controlled irrigation

Strange as it might seem, irrigation practices should be designed to keep the turf as dry as possible. If turf is irrigated excessively, thatch and Poa annua will be favoured, deep infrequent aeration is favourable especially in early morning. Early morning irrigation will assist in dew removal and will also dilute guttation fluid, both of which favour Fusarium Patch development and spread. Irrigation in the early morning also reduces the period of time when the turf is moist and susceptible to Fusarium Patch attack. Infrequent shallow irrigation is not recommended as it only succeeds in wetting surface layers thus encouraging Poa annua, shallow root growth and thatch formation. The aim should be to wet to depth, to ensure this check the root zone to ascertain the effectiveness of irrigation.