Causal organism:
Microdochium nivale
| Problem |
Microdochium Patch |
| Host Grass Types |
All cool season turfgrass species |
| Symptons |
Circular patches up to 300 mm in diameter. Leaves become water soaked, turn reddish-brown and then bleach. Mycelia may be visible in early morning |
Conditions that can favour the development of the disease
- Cool, damp conditions
- High humidity
- High Nitrogen (N) fertility in autumn
- Excessive thatch
Management strategy to reduce the likelihood of attack
- Do not apply excessive amounts of Nitrogen during high-risk periods
- Maintain turf health without producing unduly soft, lush growth
- The use of slow release fertilizers, will help prevent soft growth
- Control excessive thatch through a programmed approach
- Avoid surface moisture (dew removal)
- Irrigate in the morning to minimise long periods of leaf wetness overnight
- Check the pH and carbonate content of irrigation water because high levels can increase the likelihood of attack
- Increase airflow
- The use of acidifying fertilizers will reduce the level of disease incidence
- Use fungicides as part of your iTurf programme and be aware of causing resistance to one chemical group by its regular use
Appropriate supporting ranges for the maintenance of healthy turf:
- SierraformGT
- Greenmaster Pro-Lite
- Greenmaster Liquid
Treating Microdochium Patch with fungicide
Ensure you achieve good coverage by using the correct nozzles. The Syngenta XC Turf Nozzles have been engineered to achieve an improved coverage with reduced drift compared to flat fan type nozzles. The Foliar XC 04 is recommended for foliar fungicide applications.
Appropriate fungicides for the control of Microdochium Patch are:
- Heritage
- HeritageMaxx
- BannerMaxx
- Instrata
- MedallionTL
- Headway
Preventative Strategy (Guidance Only)
Curative Programme (Guidance Only)
