John Colhoun FLS (born 15 May 1913, Castlederg, County Tyrone, Northern Ireland – 5 January 2002, Stockport, Cheshire, England) was a British mycologist, phytopathologist, and professor of cryptogamic botany.
[2] Born into a farming family, John Colhoun preferred an academic approach to agriculture.
The research concerned how nutrition and nitrogen content are related to the growth of fungal pathogens that damage apples.
From 1939 to 1960 he held a concurrent post in the Plant Pathology Division of the Ministry of Agriculture of Northern Ireland.
During the 1940s, he collaborated with Arthur Edmund Muskett on diseases of flax, which during WW II was an economically important crop in Northern Ireland.
During his early years at QUB, he made frequent radio appearances giving information on plant pathology to listeners interested in gardening.
[3][1] In 1960 Colhoun moved, with his family, to England when he was appointed to the University of Manchester's professorial chair of cryptogamic botany.