Survey for the disease incidence of leaf rot a new disease of onion in Karnataka

Abstract

The roving survey for leaf rot disease was conducted in major onion growing districts of Karnataka viz., Chitradurga, Bagalkote, Dharwad, Vijayapura and Gadag. An intensive roving survey was conducted in major onion growing districts of Karnataka, during monsoon season of 2017-18 revealed that, the disease incidence was ranged from 6.6 to 24 percent. The average disease incidence (16.50%) observed in Gadag district followed by Bagalkote (14.78%), Dharwad (10.93%), Vijayapura (8.73%) and the average disease incidence (7.35%) was noticed in Chitradurga district. Among the five districts surveyed, average percent disease incidence of onion leaf rot was observed highest in Gadag (16.5%). Whereas least incidence at Chitradurga (7.35%).