Causal organism: Homo Sapien
| Problem |
Thatch |
| Host Grass Types |
Most grass types |
| Symptons |
Soft, spongy, moisture retentive, disease-prone turf |
Background information
- Thatch is the layer of partially decomposed organic matter situated below the green leaf material of the turf and above the soil itself
- Thatch can hinder root development by creating a moisture retentive sponge that discourages deep development
- Thatch provides an ideal environment for turf pathogens and insect pests
- Thatch becomes hydrophobic when it dries out and it can cause water holding problems
Management strategy to reduce the likelihood of occurrence
- Control should be via an integrated approach of cultural practices and sensible product use
- Aerate to encourage soil microbial action
- Scarify as appropriate to remove dead plant material
- Apply topdressing to dilute thatch
- Use correct levels of nutrition. Excessive nitrogen will encourage thatch
- Use the correct types and rates of nutrition
- Wetting agents to aid water management
- Use soil biostimulants to encourage microbial break-down of thatch
- Box off clippings to limit build-up of dead plant material in soil
- Improve drainage
- Refrain from overwatering
Preventative Strategy (Guidance Only)
