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An early form of domesticated broomcorn was being harvested across northern China possibly as far back as the 8th millennium BC (Lu et al. 2009) and certainly by the late 7th millennium BC (Liu & Chen 2012). By the 4th millennium BC broomcorn was being farmed in highland Sichuan (SE China) (dâAlpoim Guedes 2011). Domesticated broomcorn is first reported in the west around the early sixth millennium BC in places including Sacarovka, Moldavia and on the Dniester by mid 6th millennium (BC Anthony 2007). It is also found in slightly younger contexts at Tepe Yahya, Iran and Arukhlo, Georgia.
Although these techniques were strictly controlled by imperial decree, eventually silkworms were smuggled out to establish sericulture in Korea, Japan, and India. It seems to be first produced in China around 3000 BC. Silk was spun in ancient China from silkworms (b<i>ombyx mori</i>) as early as 5000 BC. Over the period from 2700 BC to 1600 BC, domestication techniques enabled extensive production of silk thread and cloth.