leaf roll

noun Plant Pathology.
a viral disease of plants, especially potatoes, characterized by upward rolling of the leaflets, chlorosis, stunting, and necrosis of the phloem.

Origin:
1925–30

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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First report of new variant of cherry leaf roll virus in potato.
The photo doesn't show a leaf roll, which should be present for a larva of this size.
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