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
Red Thread (Pink Patch)
The causal agent for red thread or pink patch is Laetisaria fuciformis and Limonomyces spp.
Meltingout
The causal agent for Melting Out and Leafspot is a group of fungii that includes Drechslera spp & Curvularia spp.
Slime Moulds
The causal agents for this disease include many Basidiomycete spp. It is generally seen in winter when cool and wet
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