Renaissance Dyeing blogs about dyeing sock yarns from cherry reds to pale pinks with cochineal. http://www.renaissancedyeing.com/latest-news_cochineal/
Mulberry silkworms have been cultivated in China for nearly 5000 years by professional silkworm keepers of the Imperial Court on trays of mulberry leaves. http://www.wildfibres.co.uk/html/silk.html