142 
fested with nematodes that its use for truck crops has been discontinued. 
This nematode infestation has been present at least five years. 
CTIERRY. 
Leaf-spot caused by Coccomyces hiemalis was the most serious cherry 
disease and was generally prevalent and widespread. It was responsible 
for a marked yellowing of the foliage and consequent defoliation. Undoubt- 
edly leaf-spot is a limiting factor in cherry production in Indiana. C. L. 
Burkholder reports that a successful spray control was secured by R. A. 
Simpson at Vincennes, using Bordeaux 2-4-50. 
Brown rot due to Sclerotinia cinerea was reported by one grower near 
Indianapolis to be very severe on the Ox-heart variety. 
Powdery mildew due to Podosphaera orycanthae was found in Jackson 
County. 
CLOVER. 
Anthracnose due to Colletotrichum trifolii was very serious on red clover. 
A badly diseased field was noted near Hartford City. 
Leaf-spot caused by Pseudopesiza trifolii was found in Hancock County. 
A spotting of sweet clover due to Ascochyta caulicola was found in Jef- 
ferson County. 
Corn. 
The most serious disease of corn was the root rot due to Fusarium 
species. G. N. Hoffer reports that this disease was state-wide in distribu- 
tion but was worst in Shelby, Noble, and Bartholomew counties. It is 
worse in the lighter soils and in clay spots in the fields. The disease 
causes firing of the lower leaves and results in barrenness and nubbin pro- 
duction. The loss in yield due to root rot is estimated at 5% to 10%. 
The fungus is carried in the seed and also persists in the soil. 
Leaf sheath, nodal, ear and root infection with the fungus Gibberella 
saubinetii has been the cause of much loss this year according to Hoffer. 
The most important injury is due to the shank infection which causes the 
ears to lop over and to the root rot. This is the same fungus which causes 
wheat scab." 
Hoffer also reports that corn ear rots due to Fusarium and Diplodia 
were not prevalent this year because of the fact that the weather was 
very favorable for the ripening of the grain. October and November 
Hloods in southern Tudinna have caused much loss in seed corn, however, 
Aue to molding of the ears both on the stalk and in the shock. 
Smut caused by Ustilago zeae was present in the usual abundance. It 
was worse in sweet corn and in fields where corn was grown in 1918. 
Rust caused by Puccinia sorghi was less abundant than usual and was 
most common in the late plantings of sweet corn. 
Stewart’s disease caused by Bacteriwm stewartii was found near Ladoga, 
1Hoffer, G. N., Johnson, A. G., and Atanasoff, D. Corn root—rot and wheat scab 
Jour. Agr. Research 14 :611-612. 1918. 
