orange leaf rust

noun

Definition of orange leaf rust

: a rust of wheat and other grasses caused by a fungus (Puccinia triticina), characterized by orange-colored pustules on the leaves, resulting in decreased yield and quality of grain, and involving as alternate host of the parasite a meadow rue or related plant

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Cite this Entry

“Orange leaf rust.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/orange%20leaf%20rust. Accessed 13 Aug. 2022.

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