Answer: It might be Japanese beetle grub damage as they will destroy the roots so that the grass can be peeled away. Birds, skunks and moles will also feed on the grubs. These can be controlled over several years time with milky spore or beneficical nematodes. There are also some diseases that can appear as dying circles in the lawn. These tend to appear during periods of high humidity and high temperatures and can be controlled to some extent by cultural practices and selection of resistant cultivars of lawn grass. I would suggest you work with your county extension to obtain a definite identification of the problem and based on knowing that, work from there. I'm sorry I can't be more specific for you long distance.
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