sentences:  The symptoms of leaf blight infections begin as one to several circular reddish-purple spots, 3/8” to 1/2” in diameter on a leaflet and enlarge to form V-shaped lesions with a dark brown inner zone, a light brown outer zone, and a purple, red, or yellow perimeter.Lesions follow major veins progressing inward, which is what gives rise to the characteristic V-shaped lesions that result after the pathogen has established a strong infection in the plant tissue.The whole leaflet may turn yellow and then brown due to infection and subsequent necrosis of the plant tissue.