A Review on Blight and Bulb Rot of Onion caused by Sclerotium rolfsii Sacc.

Author: Rimamay Konjengbam

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Abstract

Onion is an important crop that is well known for its culinary and medicinal purposes throughout the world. Blight and bulb rot of onion Sclerotium rolfsii Saccardo has been reported from different areas. The above ground symptoms includes blighting and wilting while underground symptoms includes soft and watery rots accompanied by white mycelium of the fungus. The disease is favoured by moist soil and cool temperature. The pathogen produces sclerotia for survival. The pathogen is omnivorous and soil borne. The disease also developed after harvest during storage which is also characterized by soft rots and presence of mycelium as well as sclerotia. This reduces commercial value and marketableness of the harvested produce. Thus, efficacious management practices should be adopted to avoid both pre harvest as well as post harvest economic loses. Several approaches are efficiently adopted for efficiently managing S. rolfsii in vivo conditions. Newer approaches which are alternatives to har

Keywords

Onion, Sclerotium rolfsii, Blight, Bulb rot, Sclerotia.