144 
Drop caused by Sclerotinia libertiana occurred to a serious extent in 
some greenhouses in the late crop during cloudy weather. 
A leaf-spot, probably of bacterial origin, and a rosette probably due to 
Rhizoctonia were also found in the greenhouse crop. 
MAPLE. 
Sunseald or drouth injury was severe on hard maples along city 
streets. The injury occurred in July and its effects were visible for 
several weeks. The leaves turned brown about the margins and between 
the veins and curled upward. 
Oak. 
Sunseald similar to that on maples occurred on shade trees during July. 
OATS. 
Leaf-spot or spot blotch caused by Helminthosporium avenae was re- 
ported from 28 out of the 254 fields of oats examined in the federal cereal 
disease survey. R. V. Allison found it very abundant in fields in Madison, 
Delaware, Wabash, Noble and Lagrange counties. Septoria leaf-spot was 
found in four of these fields, bacterial blight in six, and scab caused by 
Gibberella saubinetii was found in eight with a maximum incidence of 45%. 
Blast was reported from 92 of the fields and was found very abundant in 
Noble, Lagrange, Wabash, Delaware and Madison counties. 
Covered smut caused by Ustilago leavis was reported from eleven fields. 
Loose smut caused by Ustilago avenae was found in 208 or 82% of the 
fields examined, with an average incidence of 3.5% and a maximum of 24%. 
Out of 30 fields, the seed for which was treated by the wet formaldehyde 
method, 13 showed loose smut with an average incidence of 0.2% and 
a maximum of 2%. Out of 26 fields planted with seed treated by the 
dry formaldehyde method, 22 showed loose smut with an average incidence 
of 0.8% and a maximum of S%. 
Leaf rust caused by Puccinia coronata was reported from 197 or 77% of 
the 254 fields with an average incidence of 17% and a maximum of 100%. 
Stem rust caused by Puccinia graminis was found in only 17 fields, with 
an average incidence of 0.6% and a maximum of 30%. 
ONION. 
Smut caused by Urocystis cepulac has been found by C. T. Gregory 
in a few fields at Hammond just across the state line from an area of 
infection in Illinois. 
Smudge caused by Colletotrichum circinans was found on white bulb 
onions in the Indianapolis market gardens. , 
Pink root and Fusarium bulb rot were found in one field near Garrett 
in Dekalb County. 
In Dekalb and Fulton counties there was considerable difficulty: with 
onions in muck soils due to a severe stunting of a large percentage of 
the plants which resulted in a marked irregularity of the stand and con- 
