Blight - a disease common in Saintpaulia. Caused by a fungus. The plant initially slow growth, some fade, the leaves lose their color, the disease rapidly progresses and the plant dies. The first impression in this disease that the plant lacks water, but after watering turgor can not be restored, and the leaves are even more wilt, stem rot begins. Source of contamination - a mixture of ground (not sterelizovannye), implements and pots after the plants are diseased.
Control measures. Usually the disease is detected and determined at the stage where it is impossible to save the plant, it is easier to prevent the disease. Be sure to sterilize the soil for planting, especially if you dilute the plants are very susceptible to late blight (eg, violet). Pots before planting and equipment pour over boiling water. Cut only for reproduction of a healthy leaf.