139 
53% of the 36 fields with an average incidence of 3.3%. One field in Mad- 
ison County showed 35% scab. This field was in corn in 1918. 
Leaf rust caused by Puccinia simplex was found in six out of the 36 fields 
with an average incidence of 1.2% and a maximum of 20%. Stem rust 
caused by Puccinia graminis was found in 13 fields with an average inci- 
dence of 2.1% and a maximum of 20%. Neither of these diseases was of 
any considerable economic importance. 
Covered smut caused by Ustilago hordei was found in 10 of the 36 fields 
with an average incidence of less than 144% and a maximum of 8%. Loose 
smut due to Ustilago nuda was found in 30 or 83% of the fields with an 
average incidence of 1.6% and a maximum of 259%. None of the 36 fields 
examined had been planted with treated grain. 
BEAN. 
The garden crop suffered severely from drouth injury, which was eyi- 
denced by a downward curling and extreme distortion of the leaves ac- 
companied by marginal browning. Bacterial blight caused by Pseudomonas 
phaseoli was generally present in all gardens and constituted a serious loss- 
producing factor. Late in the season, the mosaic disease became very prey- 
alent. Its symptoms may have been masked by the universal drouth injury 
earlier in the season. The leaf spot caused by Phyllosticta phaseolina was 
found at Lafayette. 
BEET. 
The sugar beet crop of Lake County seemed to be more or less free from 
disease except for some leaf-spot caused by Cercospora beticola. <A little 
scab due to Actinomyces scabies was found, and crown gall was reported 
by growers. A crown rot of the roots was noted in DeKalb County. 
Garden beets throughout the state were generally infected with the leaf- 
spot due to Cercospora beticola, but as a rule the attack was not particularly 
severe. 
BLACKBERRY. 
Orange rust due to Gymnoconia peckiana was very widespread and abun- 
dant throughout the state in late May and early June. 
BLUEGRASS. 
The slime mold, Physarwm cinereum, caused conspicuous patches in lawns 
early in the spring. 
CABBAGE. 
The limiting factor in the cabbage crop of Indiana this season was the 
yellows disease caused by Fusarium conglutinans. The extremely hot 
weather was especially fayorable to this disease and it was widespread 
throughout the state both in small gardens and in truck fields. In certain 
of the market gardens near Indianapolis, the early crops of Wakefield and 
