Leaf Spot on Ryegrass
The causal agent for Leaf Spot is Drechslera & Curvularia spp. and it can affect all turf-grass species.
Problem Overview
The causal agent for Leaf Spot is Drechslera & Curvularia spp. and it can affect all turfgrass species. Turf when close mown is more susceptible particularly during drought conditions. It is seen as browning of the leaf and general thinning of the sward.
Solutions
Unless the infection is severe no treatment should be administered
In severe cases fungicides applied at label rates will prevent further spread. However, to achieve a high level of efficacy fungicides must be applied as soon as the symptoms are noticed.
Fungicides now need to be purchased and applied by a qualified person (Grow Safe certification).
Other Similar Lawn Problems
Crown Rust
The causal agent for Crown Rust is the plant pathogen Puccinia coronata. and it affects both ryegrasses and Kentucky Bluegrass.
Fusarium
The causal agent of fusarium is Microdochium nivale and most cool season grasses can be affected, particularly during periods of cool, humid weather in late autumn.
Dollar Spot
The causal agent for Dollar Spot is Sclerotinia homoeocarpa and all turf grass species can be affected.
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