The southern chinch bug was found in large numbers and was determined to be cause of the damage. The adult bug has silvery wings and is 3 to 4 mm (1/8 to 1/6 inch) long.  (Photo of adult bug by Mr. Jim DeFilippis.) First instar nymph (lower right) and eggs (upper left) are about 1 mm long and reddish. Symptoms alone cannot be relied on to determine the cause of a turf problem, but the blotchy pattern of chinch bug damage is very typical. Leaf blades in the dying margin are often yellowish orange, and that is where one finds the most chinch bugs.