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发帖数: 1 | 1 fruitless pear tree. 叶子上很多黑点。 | x*****7
发帖数: 1 | | x*****7
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发帖数: 1 | | G********r
发帖数: 492 | 5 是一种病菌。
“Fabraea leaf spot, also known as leaf blight and black spot, is caused by
the fungus Fabraea maculata. This disease usually appears late in the
growing season but can occasionally develop in late May and early June.
Fabraea leaf spot attacks leaves, fruit, and twigs of pear. ... Severely
infected fruit may also crack.”
https://portal.ct.gov/CAES/Fact-Sheets/Plant-Pathology/Disease-Control-for-
Home-Pear-Orchards |
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