Pears, Viruses, Fruit diseases
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Stony pit, a virus disease of pears, has been found in a number of districts in Western Australia, the first case having been noted in 1945. Descriptions of pear abnormalities found in old records suggest that the disease was present 30 years ago.
Harvey, H. L.
"Plant diseases - Stony pit of pears,"
Journal of the Department of Agriculture, Western Australia, Series 3: Vol. 6
, Article 10.
Available at: https://researchlibrary.agric.wa.gov.au/journal_agriculture3/vol6/iss3/10