u/andf0rest

Hey everyone,

​I just got back from vacation and left the lawn on an automatic irrigation schedule. Upon returning, I noticed these localized patches appearing (see attached photos) and I'm trying to figure out the exact cause to fix it.

​I have a couple of theories, but I'd love to get your expert opinion:

​Overwatering / Black Layer: I suspect the irrigation might have been overkill, leading to soil compaction, lack of oxygen, and potentially the start of some anaerobic black layer conditions / root rot.

​Fungus: On the other hand, the combination of summer heat and constant moisture makes me worry it could be a fungal disease (like brown patch or similar).

​What do you guys think looking at the pictures? Does this look like suffocation from overwatering, or does it have the hallmarks of a fungus?

​Any advice on diagnostics or next steps to recover these areas would be highly appreciated. Thanks in advance!

Maximum and severe

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​Hi everyone, I've noticed a recent issue on the turf that I need help diagnosing.

​Individual grass blades are turning dark purple and then black. It's not a general chemical burn.

​Here are the details:

​Symptoms: Dark purple/lilac areas that become black on the blades. Also, in some areas, it forms patches that look like it lacks watering/irrigation.

​Turf type: Football pitch (low-cut turf).

​My suspicion: I suspect some type of fungal disease, possibly Helminthosporium (Leaf Spot), but I want to confirm.

​Request:

​Can you help me identify this based on the photos? What type of fungus do you think it is?

​Any recommendations for management or effective treatment?

​I'm attaching macro photos taken today. Thanks in advance for the help!

Found in the pyrennes.

Hi everyone, looking for advice on these symptoms:

Symptoms: Shredded/white tips and necrotic lesions on the leaf blades (see photos).

Environment: Pyrenees (high altitude), heavy morning dew.

Mower: Dennis reel mower.

Is this just dull blades (mechanical stress) or an early fungus like Dollar Spot? Should I apply fungicide or just sharpen and add some nitrogen?

Thanks!