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Polish cochineal
Polish cochineal (''Porphyrophora polonica''), also known as Polish carmine scales, is a scale insect formerly used to produce a crimson dye of the same name, colloquially known as "Saint John's blood". The larvae of ''P. polonica'' are sessile parasites living on the roots of various herbs—especially those of the perennial knawel—growing on the sandy soils of Central Europe and other parts of Eurasia. Before the development of aniline, alizarin, and other synthetic dyes, the insect was of great economic importance, although its use was in decline after the introduction of Mexican cochineal to Europe in the 16th century.
== Biology ==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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