Need some help on this one folks. Attached are some pics, the first being of the backyard (mostly). It was taken to show how much canopy exists above the turf. The pics following in succession are merely closer, closer closer....you get the idea. Please take notice of the location of the damaged area in relation to the rest of the turf and canopy. Lack of sunlight? I am at a loss here. The area in question is not visually symptomatic of any turf harming event, other than a very small amount of grey leaf spot. Certainly not enough to cause this kind of damage. Soil test's (2) don't reveal anything that would be contributory to this either. Latest fert app was on 7/12/05, 8-2-16 50%PPSCU 6FE 2MN 1MG W/TALSTAR. Turf type is Palmetto (an improved variety of St. Augustine that is supposed to be shade tolerant). Per the customer installation was done approximately 7 months ago (I took a contract on it last month). Turf does not pull up, indicating to me the install was done half way decently.