Grass - New growth dies off
I reseeded several areas of my yard. "Dead grass.jpg" is shady area. New topsoil and Scott's shade seed. Started lush, got to several inches then laid down and died. The photo shows edge of healthy established grass. "Dead Grass 2.jpg" different area different seed, same result. The seed was good brand, can't recall but bearded guy on packaging. This was sun and shade seed.
I am stumped. I watered daily and was pleased with good result...until I wasn't.
Sounds like you have seeded recently. High temperatures, high humidity, and daily watering increases disease issues. There is nothing you can do at this point.
In the fall overseed the bare spots with a fine fescue. Fine fescues are recommended for shady areas. They are comprised of creeping red fescue, chewings fescue, and sheep fescue. Theses grasses do not like a lot of foot traffic, soil needs to be well drained, do not like high rates of fertilizer, and wet conditions.
See our publication on overseeding and maintenance http://extension.umd.edu/sites/default/files/_images/programs/hgic/Publications/HG102%20Lawn%20Estab... http://extension.umd.edu/sites/default/files/_images/programs/hgic/Publications/HG112_Turfgrass_Main...