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

摘要

Carrot (Daucits carota L.), out of the most important vegetables root crop. It is infected bv several pathogen among them Alternaria leaf blight most devastating disease is considered to be a great threat to its production world widely. Assessment ofdisease 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 tehsilsriz, Bawadi, Balesar, Lohawat, Osian and Tinwariof 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.