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Ralstonia solanacearum is a Gram-negative bacterium. Due to extensive genetic diversity amongst strains, it is also known as the R. solanacearum species complex. It causes lethal wilt disease in more than 450 plant species across the globe and its host range is expanding each year. R. solanacearum exhibits puzzling infection behaviour and high aggressivity on plants. Due to its unpredictable nature, pathogenicity studies in the case of R. solanacearum are still a big challenge. This note discusses about the R. solanacearum pathogen in the context of bacterial wilt disease which is considered as an emerging threat for crops and decorative plants.
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