31. Microscopically, the cystic space contains necrotic cell debris and macrophages filled with phagocytosed material. 32. When the bacteria reach the corn stalks, the vascular bundles become brown and necrotic . 33. Furthermore, swabbing of the mouth and throat areas to remove necrotic tissues is common. 34. Without treatment, necrotic soft tissue may become gangrenous, leading to loss of limbs. 35. These streaks enlarge and coalesce forming necrotic lesions with light gray centres and yellow perimeters. 36. Necrotic ringspots render potatoes unmarketable and can therefore result in a significant loss of income.37. Also, a black necrotic lesion known as an eschar develops where the chigger fed. 38. The mine consists of brown necrotic blotches. 39. The lesions may develop into large, firm necrotic masses that may block the lumen. 40. Perianal tumours can also discharge when they fungate, or otherwise become cystic or necrotic .
