Replanting of trees on the battle-scarred hill following the Civil War included setting out more than one hundred elm seedlings brought from the campus of Yale University between 1865 and 1877. In 1951 the elm disease (Pholem Lecrosis) was identified on campus elms, and a program of spraying to eradicate the insect that spread the disease was begun. In 1956 Dutch elm disease was positively identified as having attacked seven of the Hill trees. The UT Physical Plant Department purchased a special sprayer to spray DDT on the trees in an effort to eradicate the disease’s carrier—the small European bark beetle—and removed and burned affected trees. In 1978, after government regulation of DDT, the trees were treated with Fungi-Sol and Stemix. But eventually, all the campus elms became infected and were removed. In 1956 UT had approximately three hundred elm trees and more than one hundred on the Hill.