In 2001. galls were analysed of Pemphigus spyrothecae Pass. taken in one- to three-week intervals from Populus nigra and P. nigra var. https://www.ensemblecarpediem.com/product-category/balloons-bubble/
Occurrence, development and natural enemies of Pemphigus spyrothecae (Homoptera, Pemphigidae)
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