Blackgrass has two distinct regional meanings. In the UK, blackgrass (Alopecurus myosuroides) is a seriously problematic grass weed that infests wheat and cereal crops, causing significant yield losses and notorious for developing resistance to herbicides — a major agricultural concern in arable farming. In the US, blackgrass refers to a salt marsh plant (Juncus gerardii or similar species) used historically for facing and stabilising dikes. The UK agricultural sense is by far the more culturally prominent in current usage.
The blackgrass in the south field had developed resistance to the standard herbicide, leaving the farmer with few options.
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(US) , a salt marsh plant used for facing dikes.
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(UK) , a weed that harms wheat crops.
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Regional slang from around the English-speaking world — British, Australian, Irish, Caribbean, Nigerian, Filipino, AAVE, and the hyphenated-English dialects that make the internet sound local.
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