442 _. OHIO EXPERIMENT STATION: BULLETIN 214 
Anthracnose ( Glocosporium /ragariae Mont.) has been found upon strawberry 
leaves in other states; it has geen less trouble than the other foliage diseases 
with us hap to this time. 
Fig. 91. Leaves of strawberry attacked by Leaf-Spot. 
The lighter centers have dark borders. This fungus forms 
ascospores in the strawberry leaves. From a photograph by 
T. F. Manns. : 
old leaves and the fungi upon them, as well as 
right principles and is commonly successful. 
SUGAR BEET 
__ Crown-Rot (Phoma betae 
Frank) has been discovered 
in most of the sugar beet grow- 
ing states and is liable to be 
present in Ohio inthe factory 
district. 
Leaf-Spot. The sugar beet, 
which is beginning to be 
extensively cultivated with us, 
has been injured by the leaf- 
spot fungus (Cercospora beti- 
cola Sacc.) and by other 
diseases. The leaf-spot pro- 
duces small, dead areas in 
the beet leaves, followed at 
times by dying ot all the 
leaves. For this fungus Bor- 
deaux mixture may be applied 
with confidence, at intervals 
of three weeks. The first 
application should be made 
when the plants are about 5 
or 6 inches high. 
Root-Rot occurs at times, 
particularly upon beet seed- 
lings where planted in rich 
trucking soil. The fungus one 
Leaf-Spot or Rust so-called 
is the most serious disease of 
older strawberry leaves. The 
leaf-spot fungus (Sphaerella 
Sragaria (Tul.) Sacc.) matures 
in the old leaves. In the 
earlier spots on young leaves 
three forms of fungi are found, 
most of which are probably 
‘stages in the development of 
the leaf-spot fungus. This 
disease is essentially one of 
the season before the crop is 
injured. Spraying upon new 
plantations after picking any 
fruit present will usually be 
found profitable. The practice 
of burning over strawberry 
beds after picking to destroy 
possible insects, is based upon 
Fig. 92. Leaf-Spot trouble on sugar beet. 
