Indiana Plant Diseases. 203 
SWEET POTATO. 
Black rot caused by Sphaeronema fimbriatum (Fig. 10) and scurf caused 
by Monilochaetes infuscans were present in the seed being planted on one 
farm near Vincennes. 
Fusarium stem rot was of rather widespread occurrence and was noted 
at Vincennes, Indianapolis and Lafayette, in some cases, in fields not pre- 
viously in sweet potatoes. This disease caused stunting, yellowing or wilt- 
ing, and premature death of the vines and a conspicuous blackening of the 
interior portions of the stems. 
TIMOTHY, 
Stripe smut caused by Ustilago striaeformis was collected near Lafayette 
by Dr. A. G. Johnson. 
TOMATO, 
Septoria leaf-spot was worse than last year and was by far the most 
serious and widespread parasitic disease of tomatoes. It was generally 
present in gardens and the canning crop and the wet weather greatly 
favored its development. In many cases extreme defoliation was caused 
and the fruit was exposed to sunscald. In an experimental field near 
