cotton rust

noun

Definition of cotton rust

1 : a disease of cotton caused by a rust fungus (Puccinia stakmanii) that produces slightly elevated greenish yellow or orange aecia chiefly on the undersurface of the leaves
2 : a potash-deficiency disease of cotton that produces a rusty brown color in the leaves

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Cite this Entry

“Cotton rust.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cotton%20rust. Accessed 24 Sep. 2021.

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