“The French botanist and chemist Henri-Louis Duhamel de Monceau (1700–1782) identified a fungal disease on the bulbs of saffron crocus (now named Helicobasidium purpureum) and illustrated its sclerotia on the bulbs. His report was read to the Academie royale des Sciences in April 1728; it was “wellconceived, thorough, and conclusive, and led to his election as adjoint chimiste in the same year” (Eklund 1971:223). Duhamel discovered that this fungus spreads underground from one bulb to another. In his Éléments d’agriculture (two volumes, 1762; English edition, 1764), he also accepted insects as a cause of some plant diseases.”

Joseph Pitton de Tournefort, " A History of the Ecological Sciences, Part 29: Plant Disease Studies During the 1700s http://esapubs.org/bulletin/current/history_list/history29.pdf." in: Bulletin of the Ecological Society of America, July 2008, p. 231-242.