Keywords: Polish cochineal.jpg Life cycle of the Polish cochineal Porphyrophora polonica and its host plant the perennial knawel Scleranthus perennis <br> From cite book Breyn Johann Philip Historia naturalis Cocci Radicum Tincttorii quod Polonicum vulgo audit 1731 The Academy of Natural Sciences Library Philadelphia United States Source cite journal Mushak Paul The Use of Insect Dyes in Oriental Rugs and Textiles Some Unresolved Issues Oriental Rug Review VIII 5 Ron O'Callaghan June/July 1988 http //www rugreview com/orr/8-5-33 htm 2007-01-26 PD-old Porphyrophora polonica |