One of the mysteries of the English language finally explained.
A virus disease of potatoes marked by upward curling of the leaves.
- ‘Just last year, or early this year, there were some major viral outbreaks of potato leaf roll virus in Australia.’
- ‘Perhaps more insidiously, insects such as fruit fly can carry spores associated with bunch rots, and mealy bug can transmit leaf roll virus.’
- ‘It claims that their insect-resistant potato requires 40 percent less insecticide (for the Colorado potato beetle and aphids that transmit leaf roll virus disease) than other varieties.’
- ‘The biggest concern in the Pacific Northwest is the green peach aphid, because the aphid transmits leaf roll and other viruses.’
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