PLATE 99 
A. —Leafspot of horse nettle produced by inoculation with a pure culture of Septoria 
lycopersici from a tomato leaf. Photographed two weeks after inoculation. Natural 
size. 
B, C.—Sections of horse nettle leaf showing pycnidia and spores in mass, produced 
by inoculating plants with a pure culture of 5 . lycopersici from tomato. 
