Mustard plant

c. 1368–1550|left Although some varieties of mustard plants were well-established crops in Hellenistic and Roman times, archeological records for any of these crops are not reported. Wild forms of mustard and its relatives, the radish and turnip, can be found throughout West Asia and Europe, suggesting their domestication took place somewhere in that area. The Encyclopædia Britannica states that mustard was grown by the Indus Civilization of 2500–1700 BC. According to the Saskatchewan Mustard Development Commission, "Some of the earliest known documentation of mustard's use dates back to Sumerian and Sanskrit texts from 3000 BC". A 2021 genetic study of B. rapa concluded that the species may have been domesticated as long as 6,000 years ago in Central Asia, and turnips or oilseeds might have been the first product. The results also suggested that a taxonomic re-evaluation of the species might be needed. ==Species==

White mustard (Sinapis alba) grows wild in North Africa, West Asia, and Mediterranean Europe, and has spread further by long cultivation; brown mustard (Brassica juncea), initially from the foothills of the Himalayas, is grown commercially in India, Canada, the United Kingdom, Denmark, Bangladesh and the United States; black mustard (Brassica nigra) is grown in Argentina, Chile, the US, and some European countries. Canada and Nepal are the world's major producers of mustard seed, between them accounting for around 57% of world production in 2010. White mustard is commonly used as a cover crop in Europe (between UK and Ukraine). Many varieties exist, e.g., in Germany and the Netherlands, mostly differing in lateness of flowering and resistance against white beet-cyst nematode (Heterodera schachtii). Farmers prefer late-flowering varieties, which do not produce seeds; they may become weeds in the subsequent year. Early vigor is important to cover the soil quickly and suppress weeds and protect the soil against erosion. In rotations with sugar beets, suppression of the white beet-cyst nematode is an important trait. Resistant white mustard varieties reduce nematode populations by 70–90%. Mustard species are a common host plant to Phaedon cochleariae, a beetle native to Europe. Due to their particular diet, they have been colloquially referred to as mustard leaf beetles. == Gallery ==