- запретили в начале 20-го века, потому что на смородине может развиваться болезнь, опасная для местных ценных пород деревьев, типа вирджинской сосны и прочих.
Позже выяснили, что всё не так плохо и для местной флоры куда вреднее завезённые "нелегалы" типа лианообразных из Южной Америки. Но запрет до сих пор действует на бОльшей части территории страны.
[As for the U.S., black currants were once very popular there as well, but in the 20th century the government banned them in almost all of the states. The reason was that black currant shrubs can host and spread a disease, the "white pine blister rust", which threatened the booming timber industry in the early 1900s.
In 1966, the federal ban on black currants was moved to individual States' jurisdiction. This led to many savvy states lifting the ban, as did the New York State in 2003 thanks to the efforts of the Currant Company and Greg Quinn. Other states lifting the ban were Oregon, Vermont and Connecticut, whereas others, such as New Hampshire, Massachusetts and Maine did not lift it as of 2007
The 20th century ban has greatly lowered the popularity of black currant across the United States, and still today blackcurrants in the USA don't have the popularity they enjoy in Europe and the U.K.
After scientific studies have proven the effectiveness of black currants in reducing swelling and inflammation, thanks to powerful nutrients such as anthocyanins, they are now increasing their popularity as a substitute for ibuprofen / aspirin, and as a healthy fruit juice]
http://black-currant.com/black-curra...urrant+History