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The pale yellowish-green galls of Eriosoma (= Schizoneura) ulmi can develop on various species of elm (Ulmus spp.). As an result half of a leaf is rolled. They are common throughout Europe. |
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The pale yellowish-green galls of Eriosoma (= Schizoneura) ulmi can develop on various species of elm (Ulmus spp.). As an result half of a leaf is rolled. They are common throughout Europe. |
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