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The 10-12 mm long galls of Pemphigus spirothecae are spirally coiled. They commonly can be found on poplar (e.g. Populus nigra) and its hybrids. |
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The 10-12 mm long galls of Pemphigus spirothecae are spirally coiled. They commonly can be found on poplar (e.g. Populus nigra) and its hybrids. |
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