Assessment of Genetic Variability in Onion against Purple Leaf Blotch Disease under Field Conditions and its Management

Abstract

Purple blotch disease is exerting a severe threat on onion production. The current study was conducted for screening of accessions against purple blotch disease and determining the source of resistance against Purple blotch disease of onion caused by Alternaria porri. Potential of 50 onion accessions was evaluated against A. porri during 2017 and 2018 under field conditions. After that effect of some fungicides and plant extracts was determined for disease suppression on a susceptible variety of onion.

Efficiency of bio-agents and green-synthesized silver nanoparticles in controlling purple blotch disease caused by Alternaria porri in onion plants

“…Therefore, effective management is necessary to sustain high crop output by avoiding such significant yield losses. Many researchers have experimented with chemical methods to control onion purple blotch (Deshmukh et al, 2007;Ali, 2008;Gupta et al, 2014;Priya et al, 2015;Ali et al, 2016;Dar et al, 2020;Sofy et al, 2020;Gore et al, 2021;Younas et al, 2021). The drawbacks of fungicides include the persistence of carcinogens, toxicity issues, environmental contamination, and the emergence of chemically resistant disease strains.…”