Frequently asked questions

What environmental triggers should turf managers monitor for brown patch outbreaks?

Brown patch (Rhizoctonia solani) favours extended periods where night temperatures remain above 20°C combined with high humidity and prolonged leaf wetness. Overcast conditions that prevent the canopy from drying, excessive nitrogen fertility (particularly fast-release sources), and poor air circulation all increase risk. The disease is most active from late spring through autumn across both warm-season and cool-season species.

How do I confirm brown patch rather than other patch diseases in the field?

The diagnostic indicator is the "smoke ring," a dark grey-purple band of active mycelium visible at the outer margin of the affected patch, most prominent in the early morning when foliage is still wet. This ring disappears as the turf dries. Affected patches are circular, ranging from a few centimetres to several metres in diameter, with a characteristic straw-coloured centre and darker border. Without the smoke ring, consider other patch diseases and submit samples for laboratory diagnosis.

What management strategies minimise brown patch severity on sports fields and fairways?

Reducing extended leaf wetness, avoiding excessive nitrogen during high-risk periods, and improving air movement are the key cultural controls. Preventative fungicide programmes should be initiated when sustained warm, humid conditions are forecast. Contact Greenway Turf Solutions for product recommendations and application timing specific to your turf species and local conditions.