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
Fairy Rings
The causal agent of this relatively common disease is fungi related to the Basidiomycete species.
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.
Meltingout
The causal agent for Melting Out and Leafspot is a group of fungii that includes Drechslera spp & Curvularia spp.
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