Thomas Jonathan Burrill (1839-1916).
Thomas Jonathan Burrill (April 25, 1839 – April 14, 1916) was an American botanist who first discovered bacterial causes for plant disease. He introduced Erwinia amylovora (called by him Micrococcus amylovorus) as the causal agent of pear fire blight.
Born in Pittsfield, Massachusetts, he graduated Illinois State Normal University in 1865. In 1868, he was elected professor of botany and horticulture at University of Illinois and remained there the rest of his career, eventually serving as Vice President in 1882.