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Definition of Halo blight
1. Noun. A blight affecting the leaves of oats and other grasses.
Generic synonyms: Blight
2. Noun. A blight of bean plants.
Medical Definition of Halo blight
1. Halo blight is a fatal plant disease which attacks legumes and is caused by the bacteria Pseumonas phaseolicola. The plant develops yellow-ringed, water-soaked spots, then withers and dies without rotting. (09 Oct 1997)