History of tobacco brought to Spain for its flowers, but "Now we use it to a greater extent for the sake of its virtues than for its beauty". John Hawkins was the first to bring tobacco seeds to England. William Harrison's "English Chronology" mentions tobacco smoking in the country as of 1573, before Sir Walter Raleigh brought the first "Virginia" tobacco to Europe from the Roanoke Colony, referring to it as "tobah" as early as 1578. In 1595 Anthony Chute published "Tabaco", which repeated earlier arguments about the benefits of the plant and emphasised the health-giving properties of pipe-smoking. The importation of tobacco
Blackleg (potatoes) the growing season, reducing tuber harvest damage, and proper storage. See the sections below for more details. Given that tubers are the primary mechanism by which "P. atrosepticum" survives and spreads, clean seed potato stocks established using tissue cultures have been very successful in breaking the cycle of carrying disease forward from year to year. Buildup of tuber contamination is limited by reducing the number of field generations of these seed potatoes to 5 to 7 years. Some methods of sterile propagation include planting only healthy, whole seed potatoes. If healthy seed potatoes are to be cut, they should be