carnation rust

noun

Definition of carnation rust

: a disease of carnations caused by a rust fungus (Uromyces caryophyllinus) characterized by discoloration and spotting of the leaves and the production of chocolate-brown powdery spore masses

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“Carnation rust.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/carnation%20rust. Accessed 26 Oct. 2020.

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