Assessment of Disease Incidence of Leaf Blight (Alternaria alternata) Disease of Carrot in Jodhpur District of Rajasthan

Carrot (Daucus carota L.), out of the most important vegetables root crop. It is infected by several pathogen among them Alternaria leaf blight most devastating disease is considered to be a great threat to its production world widely. Assessment of disease incidence is an important step and it helps in designing management strategies which help in increasing the crop yield. Therefore, a survey was conducted in carrot growing areas of different tehsilsviz., Bawadi, Balesar, Lohawat, Osian and Tinwari of Jodhpur district, Rajasthan during Rabi 2020-21 to assess the incidence of leaf blight diseases. Among them the highest intensity ofleaf blight of carrotwas observed in Tinwaritehsil (24.02%) followed by Osian (22.66%). However, minimum disease incidence was recorded in Balesar (11.74%). The overall average disease incidence of the Jodhpur district was (18.08%) based on total 125 fields surveyed in Rabi 2020-21.