 The infection slowly spreads causes necrosis until it has covered the entirety of the leaf.It results in the thinning of grass vegetation such as Zoysia, Bent, Bermuda and Buffalograss.Blighting is believed to be caused by two "C. inaequalis" mycotoxins, Pyrenocines A and B. Pyrenocines A is the more potent of the two, stunting growth and causing necrosis in vegetation.