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What causes this?

BobT

By BobT
in Lawn & Garden

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delcecchi Grand Master

delcecchi

Posted
Posted

Have you applied any chemicals or fertilizer to the lawn recently?

One time I found out not to walk through weeds freshly sprayed with roundup and then across the lawn. blush

It does look like a couple of footprints in the picture, although no scale.

spilling a little fertilizer will do that too.

Dog in neighborhood?

That's all I can think of.

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BobT Grand Master

BobT

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No fertilizer or other chemicals. We do have a dog but I've never seen this before. There's about a dozen of them scattered around my one acre lawn. They are all round like you see and about a foot in diameter.

Aliens perhaps?

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fishersofmen Grand Master

fishersofmen

Posted
Posted

Its more than likely a fungus BobT possibly Dollar Spot which can be common when the humidity picks up and especially with all the rain and moisture. A real wet lawn at night is a bad thing and we have had plenty of those this year. I would imagine some of the Blight's, Leaf Spot and other fungus's will start going crazy with all the moisture and the upcoming heat.

When it looks like someone came onto your lawn and spray painted circles or other strange designs out of nowhere more times than not it is a fungus. Thatch build-up and watering at night are a no-no. We will have customers call with fungus problems and the first thing we ask is are you watering at night, often times the answer is yes and we will reset their irrigation system to early morning. When we get rain at night it is obviously out of our control. If you haven't aerated or done a power rake recently consider doing so. Sometimes there is nothing you can do to prevent it. Fungicides work to treat it but can be expensive. Fertilizing can help the lawn grow out of it too (especially Dollar Spot) but with some fungus's added nitrogen can be counter productive. If I were you I would aerate the snot out of it and put down some fert.

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Dotch Grand Master

Dotch

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This is gonna sound kinda dumb and it took a few times until it dawned on me. When I'd get off the machine and leave it running while putting the downspouts back on, picking up some junk, moving hoses around, etc., the exhaust would scorch nice circular patches in the lawn. Still does! grin

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BeezeHound Collaborator

BeezeHound

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I had some similar looking spots like that in my yard last summer, ended up being a small hydraulic leak on my mower where a little bit where run out every time I raised or lowered the mower deck. Once I got that fixed, no more spots.

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vister Mentor

vister

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Looks exactly like the 100 or so dog spots I just scratched up and added new lawn seed to. We never had it before, but this year they were everywhere. Our female 4 year old golden retreiver was the culprit, however, they only showed up after all the snow melted. Hasn't been an issue since. But, trying to grow them all back...

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BobT Grand Master

BobT

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This is gonna sound kinda dumb and it took a few times until it dawned on me. When I'd get off the machine and leave it running while putting the downspouts back on, picking up some junk, moving hoses around, etc., the exhaust would scorch nice circular patches in the lawn. Still does! grin

Thanks for the idea. My exhaust discharges out the side rather than down so it shouldn't be the problem.

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BobT Grand Master

BobT

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I had some similar looking spots like that in my yard last summer, ended up being a small hydraulic leak on my mower where a little bit where run out every time I raised or lowered the mower deck. Once I got that fixed, no more spots.

My mower doesn't have any hydraulics aside from the transmission and I don't see any visible sign of leaking. Thanks for the suggestion.

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BobT Grand Master

BobT

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Lawn mower leaking gas?

Plus +1 my first thought.

Another good possibility but these spots are appearing in places I rarely stop while mowing and are not showing up in places where I typically stop to move things that are on the lawn. I have checked it anyway just in case and have not found any evidence to suggest a leak.

Thanks.

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BobT Grand Master

BobT

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Looks exactly like the 100 or so dog spots I just scratched up and added new lawn seed to. We never had it before, but this year they were everywhere. Our female 4 year old golden retreiver was the culprit, however, they only showed up after all the snow melted. Hasn't been an issue since. But, trying to grow them all back...

We've had female dogs for the 20+ years we've lived here and I've never seen this before. These spots didn't show up this spring after the snow melt but showed up within the last couple weeks. For the most part they are also away from the house whereas she usually urinates closer to the house. She does not drop loads in the yard at all but goes out into the tree grove, which we really appreciate.

Thanks.

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Big-Al Proficient

Big-Al

Posted
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OK I will give a shot here. Do you have a lot of June Bugs? The large white grubs can feed on the roots of the grass and create these patches. Try pulling back the dead sod and see if you see any on the edges.

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