brown canker

noun

Definition of brown canker

: a disease of roses caused by a fungus (Cryptosporella umbrina) and characterized by lesions that are initially purple, turn white, and finally become buff

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“Brown canker.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/brown%20canker. Accessed 29 Oct. 2020.

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