purple blotch
noun
: a fungal disease of onions, garlic, and shallots caused by a fungus (Alternaria porri) and characterized at first by small white circular to irregular spots which increase and become large purplish blotches sometimes surrounded by orange or salmon bands
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“Purple blotch.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/purple%20blotch. Accessed 23 Nov. 2024.
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