The GARDENA gardening expert
Dear Mr. H., I have had a good look at the photo you attached; by "this disease", I assume you mean the brown edges of the leaves that are shown.
In this context, brown leaf edges are usually the result of problems in the area of the root tips. The exact cause needs to be investigated in each case. Soil wetness or providing the plant with too much water can be a reason, as the roots then do not get enough oxygen. Over-fertilization may be another reason, as this burns the tips of the roots. Moreover, there are certain nutritional deficiencies that also cause such necrotic leaf edges.