Cotton blue disease, caused by Cotton leafroll dwarf virus (CLRDV), was first reported in 1949 in the Central African Republic and then not again until 2005, when it was reported from Brazil. In 2017, cotton blue disease was identified in Alabama, marking the first report in the United States.
Click here for original story, Next-generation sequencing used to identify cotton blue disease in the United States
Source: Phys.org