Information about tikka disease of leaves
Answers
One of the best known leaf spot diseases is that of Arachis hypogea L. (groundnut). Popularly it is called the tikka disease. The tikka disease is a serious disease occurring in areas where the groundnut crop is grown in India.
The spots appear on the host leaves when the plants are one or two months old. Later necrotic lesions appear on the stem as well. In fact there are two leaf spot diseases of groundnut caused by two different species of form genus Cercospora namely, C. arachidicola.
The leaf spot disease caused by the former is more common, dangerous and does greater damage than the latter. The spot produced by C. personata are numerous. These weaken the host plant and lead to defoliation which adversely affects size and quality of the fruit.