JOURNAL 
The New York Botanical Garden 
Voi. IX. June, 1908. No. 102. 
LEAF BLIGHT OF THE PLANE-TREE. 
A brief account of this disease, with illustrations, was given in 
began in May and lasted through the month of June. This 
serious outbreak of the disease was due to the remarkably late 
and wet spring. Many other diseases caused by fungi also de- 
velop rapidly under such conditions. Several plane-trees in the 
Garden were examined at the time and in every case the fungus 
(Gloeosporium nerviseguum) was found to be present in the in- 
jured leaves and twigs. The presence of the fungus was also re- 
ported by investigators in other localities. 
In the report of the botanist of. the Connecticut Agricultural 
Experiment Station issued in May, 1908, Dr. G. P. Clinton refers 
to the death of the young leaves of the plane-tree (Platanus occt- 
dentalis) in the spring of 1907, and ascribes the poe entirely to 
the severe frosts of May 11 and May 21. Dr. H. von Schrenk 
held the same opinion last year, and published a ae article in 
the report of the Missouri Botanical Garden, describing ‘‘frost in- 
juries”’ to the plane-trees in the Mississippi Valley and eastward. 
The blight was first noticed here this year on May 22, after 
several days of rainy weather. All of the plane-trees on the 
grounds were attacked, but most of them recovered in about two 
weeks, the spring weather being very different from that of 1907. 
As predicted last year, the terminal twigs were nearly all dead, 
and the new shoots were from lateral buds a foot or more from 
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