blackfire

noun

Definition of blackfire

: a disease of tobacco caused by a bacterium (Pseudomonas angulata) and characterized by angular leaf spots without a surrounding halo that are at first dark green but become zonate and turn grayish, tan, or dark brown and may drop out leaving ragged holes — compare wildfire

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Cite this Entry

“Blackfire.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/blackfire. Accessed 18 Sep. 2021.

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