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The major cause for loss of productivity of onion is the severe infestation of pests and diseases viz., bacterial brown rot (Pseudomonas aeruginosa) damping off (Fusarium species, Pythium species and Rhizoctonia solani), purple blotch (Alternaria porri), Iris Yellow Spot Virus (IYSV) disease (Tomato Spotted Wilt Virus), etc.

                 Thus, there is an immense need for an easily accessible management module to protect crops from heavy damage and minimize the productivity loss. It includes symptoms, causes and the effective measures to be taken to control pathogen invasion.

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