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Discussion in 'Turf Renovation' started by Crist Clapper, Jul 17, 2012.
Here's two photos... Thoughts on what the problem is? What else could I tell you that would help?
Looks like grubs.
Grub control was applied... Maybe not effective?
Where does the dog take a leak?
Do those dead areas lift off the ground like pieces of rotted carpet? How deep does the water soak into the soil?? These could be puddle areas where the water sits after the irrigation goes off...
Grubs are easy enough to spot by ripping up the dead stuff and seeing what going on underneath...
My vote goes to disease. Is it hot where you are? Pennsylvania. Humid? silly question. Was this lawn originally hydroseeded? Is the seed mixture high in perennial ryegrass? It looks like it.
If so, I suspect red thread fungus.
Dollar spot, grey leaf spot and brown patch are not out of the question.
Try to reduce the average humidity at night. Do not water after 2 pm. Water more deeply, but only three times per week--two times is better. Keep fertility level fairly high, as this reduces red thread problems. Do not buy any perennial ryegrass seed unless it claims to be resistant to red thread. Better seed costs more--and its worth it.
I'm with Riggle. Looks to be disease. My vote goes to Dollar Spot.
Brown patch or dollar spot. Daconil.
my vote is dollar spot