In the present disclosure there is provide a kit adapted for controlling root disease in plants, said kit comprising a sealed enclosure which contains therein a first container and a second container the first container is provided a first mixture of at least one plant based ingredient in weight proportion of 80 to 100 wt% and at least one first group of active ingredients in a weight proportion of 0.1 to 11 wt% the second container is provided with a second mixture of second group of ingredients in a weight proportion varying between 0.1 to 0.9 wt%. The first and the second mixtures are kept air-tight sealed in the first and the second container of the kit, and mixed and dissolved in predetermined quantity of water to prepare an herbal formulation, immediately before their intended application on the root rot affected plants. After applying the herbal formulation of the present disclosure, the inoculum load in the soils around the root zone is found to be reduced significantly and the horizontal spread of the disease is also completely checked.
