Bacterial crown and root rot disease of alfalfa is caused by a Gram negative and fluorescent bacterium Pseudomonas viridiflava. This is one of the important diseases of alfalfa, which causes crop quantity and quality losses. The bacterium was first recognized by Burkholder, then named as Phythomonas viridiflava by Dowson, and finally changed to P. viridiflava. P. viridiflava damages alfalfa plants at all growth stages. Infected seedling show symptoms which includes wilting, chlorosis, stunting, leaf yellowing and plant malformation. Plants in developed disease stage show dwarfing, and growth causal bacterium causes wound and rotting on plant roots and changes the root color.
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Citation: Heydari A, Khodakaramian G, Zafari D (2012) Characterization of Pseudomonas Viridiflava Causing Alfalfa Root Rot Disease in Hamedan Province of Iran. J Plant Pathol Microb 3:135.
Last date updated on July, 2014