Author: John

Master Greenkeeper John Quinn is the author of Performance Bowling Greens, and several other titles on Greenkeeping, Club and Business Management.

March 20, 2025

Fusarium and the Disease Triangle

Managing diseases like fusarium patch can be a challenge for bowling greenkeepers striving for healthy, high-performance turf. While fungicides provide some relief, long-term reliance can weaken natural defences and disrupt soil health. Emerging research highlights the value of PotSi as a sustainable alternative to bolster turf resilience. By strengthening cell walls, enhancing stress resistance, and activating natural defence mechanisms, potassium silicate offers a proactive approach to reducing disease severity and recurrence. Discover how integrating this innovative solution into your maintenance programme can support greener, more sustainable greens.

March 20, 2025

Phosphite and Disease Resistance

Phosphite (PO₃³⁻) is a reduced form of phosphate (PO₄³⁻), the familiar phosphorus source in traditional fertilisers. Although the two compounds are chemically related, their behaviours in plants and soils differ significantly. Phosphite is highly soluble and readily absorbed through both roots and foliage, making it a highly efficient delivery mechanism for phosphorus-related benefits, including disease and pest resistance, acting as a trigger for some of the plant's remarkable natural defence mechanisms.

March 20, 2025

Grass Root Defences: Leatherjacket control in Bowling Greens

Grasses employ a range of physical, chemical, and indirect defences to protect their roots from insect herbivores. Further research is needed to fully understand these mechanisms and to explore other potential defences, but meantime, we can take some of this knowledge and apply it now to our greenkeeping practices.

March 20, 2025

Focus on Dollar Spot

As climate change reshapes weather patterns, Dollar Spot—a turf disease once rare in the UK—has become an increasing concern for greenkeepers. This article explores how rising temperatures and humidity levels have created favourable conditions for the spread of Clarireedia jacksonii, the fungus behind Dollar Spot. Learn how to identify the disease's distinct symptoms and discover effective management strategies, including the use of Trichoderma fungi and integrated pest management practices, to combat this new challenge and help your green recover from an outbreak. Stay ahead of the curve and maintain your green's health by understanding the full impact of Dollar Spot and adapting your turf care approach.

January 8, 2025

Opening Day Preparation: Getting the mower ready.

Getting the mower ready is often seen as someone else's responsibility during the close season, but great care should be taken to make sure you are not falling foul of tradition again. Relief grinding and back lapping have become an unfortunate norm in cylinder mower set up, but can be more damaging to the turf and the mower than you might expect. John Quinn explains the theory and suggests a solution that will ensure your mower gives you trouble free service and impressive results all season long.