The ban was prompted by the outbreak of African swine fever in the region. The ban extends to the import of pigs, boar semen, pork and pork products, rawhide and intestines, hog wool, meat of wild boars, hunter's trophies, feedstuff and feed additives for farm animals and used equipment for keeping, slaughtering and butchering pigs.
African swine fever has spread across many regions of Russia. Belarus had earlier prohibited the import of potentially hazardous products from Rostov, Voronezh, Astrakhan, Volgograd, Leningrad and Nizhny Novgorod oblasts.
http://news.belta.by/en/news/econom?id=622832