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This is the pink snow mold version of the disease. It's very common in the pacific northwest this time of year. Pink snow mold does not require snow cover to flourish.
Please see the links I provided.
What is wrong with this lawn?
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Please see the links I provided.
With the exception of Daconil, there are no curative fungicides. He’s already run the best fungicide on the market and actually it doesn’t look “active”. I agree with @hedgehog_MI , looks like possibly dollar spot. Hit it with some N @ maybe .25 lb and see if it doesn’t grow out.
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could def be fusarium if it’s common this time of year. I’ve only ever seen fusarium in the spring on the east coast, with or without snow and it’s not really common unless there’s constant freezing and thawing.
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This is all good advice if it is a fungus. It still doesn't hurt to send a sample to the lab so you can know for sure.
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Using the true meaning of the the word cure, no fungicide will do this, according to some plant pathologists. However, several fungicides are marketed as both being preventative and curative, including Daconil.
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Unless the OP lives close to the gulf coast, the probability of this being dollar spot at this time of year is near zero.
www.greencastonline.com
Pest Outlook Maps | GreenCast | Syngenta
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Except that OP said he/she/they have already put down two applications of fungicide. So that tells me that if given a couple weeks between apps and the initial growth of the disease (before notice) — the disease could have originated well back close to summer or early fall.
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If that's the case, the environmental conditions that lead to the disease are probably long gone and there is nothing to do now except to repair the damage if needed.
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Yes, and to your point — to take a proactive approach to the problem by treating it as others have suggested with cultural control methods, and possibly with a preventative fungicidal program, after a positive identification of the disease.
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All diseases/ fungus are created from moisture and certain temperatures. Humidity is a form of moisture, watering everyday for 15min is the culprit here. Probably not even watering the root zone with misting heads for 15 min. The blades being soaking wet 7 - 365 is completely unnatural. You could do repeat fungicides on that lawn but if you don’t change the watering cycle it’ll never clear up. Prob why a late summer fungus is still going on.
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I would have to say that the weather is the most significant factor and a nice green lawn. You can do everything correctly in my area and still get disease if you're not using preventative fungicides at certain times of the year. By far the biggest users of fungicides in the lawn care industry are golf courses and it's not because they are utilizing poor cultural practices.
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This might be a good year to consider overseeding with some top-quality disease resistant grass seed varieties.
for instance:
The old-fashioned ryegrass types are sensitive to red thread in humid climates.
If it does not say resistant to red thread--it probably is susceptible.
for instance:
The old-fashioned ryegrass types are sensitive to red thread in humid climates.
If it does not say resistant to red thread--it probably is susceptible.
Not to make an argument here, but , 2 of the most popular fungicides , Myclobutanil and Propiconazole both say to mix with Daconil. “Curative “ is a subjective term with fungicides.
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Looks like brown patch to me.
Environmental conditions such as dense shade, poor drainage, poor airflow, and overwatering can cause fungal diseases like brown patch, large patch or dollar spot.
This article has some prevention and treatment tips: What Causes Brown Patches on Lawns? - NG Turf
Environmental conditions such as dense shade, poor drainage, poor airflow, and overwatering can cause fungal diseases like brown patch, large patch or dollar spot.
This article has some prevention and treatment tips: What Causes Brown Patches on Lawns? - NG Turf
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Dollar Spot, see the ones on the left that are about the size of a silver dollar, then they have begun to coalesce into larger areas on the right as the disease spreads. Red thread is similar, but I can't see any red on the blades that would distinguish it from dollar spot.
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A disease application is not going to fix the damaged turf. What is damaged is damaged. The fungicide will stop the spread. Also checking the soil ph would help. Getting a soil test.
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