Philip Gregory pioneered aerobiology as a topic for research, drawing
together inputs from many disciplines to contribute to better understa
nding of fungal spore dispersal, plant disease epidemiology, and aller
gy. In childhood, he was interested in natural history and meteorology
and frequently suffered from asthma. Initially, he worked with dermat
ophytes in Winnipeg, where he was influenced by Buller. Returning to B
ritain, he investigated the epidemiology first of flower bulb diseases
and then of potato virus diseases, noting the occurrence of disease g
radients in crops. He developed theories of spore dispersal during war
time air-raid duties and published these in his classic paper of 1945.
The remainder of his career was largely spent obtaining data in suppo
rt of his theories of spore dispersal and disease gradients, on unders
tanding splash dispersal, in identifying the cause of farmer's lung di
sease, and in his retirement, in elucidating the epidemiology of black
pod disease of cocoa in Nigeria.