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14 
PHYTOPATHOLOGICAL SURVEY OF THE TREES AND 
SHRUBS OF PROSPECT PARK AND THE BOTANIC 
GARDEN (BROOKLYN). 1. REPORT OF THE 
FIRST SEASON’S WORK. 
Dr. C. Stuart GaAcER, DrrEcrTor. 
Sir: I beg to submit herewith my report as Resident Investi- 
gator at the Brooklyn Botanic Garden for the summer of 1916. 
The report deals with the studies made on diseases of trees and 
shrubs in the Brooklyn Botanic Garden and Prospect Park, 
Brooklyn, 
I entered upon the work June 19, and continued at the labora- 
tory of the Botanic Garden until September 11, when it was 
necessary for me to return to my regular duties at the University 
of Missouri. During this period, numerous trips were made 
through Prospect Park and the Botanic Garden for the purpose 
of noting and collecting the various fungous diseases of the trees 
and shrubs. 
I wish to acknowledge the lively interest of Mr. Raymond V. 
Ingersoll, Commissioner of Parks, Borough of Brooklyn, in this 
work, and his generous courtesy in placing men and equipment 
at my disposal, and in permitting the collection of specimens for 
study and preservation. JI am especially indebted to Mr. J. J 
Levison, then arboriculturist of the Park, for facilitating the sur- 
vey of the diseased conditions in the Par ie Mr. John J. Lennon, 
foreman of laborers, aided in every way possible in obtaining 
the material. At different times he kindly placed at my disposal 
some of his workmen, who assisted me in securing the various 
specimens from the trees. 
‘ In Prospect Park and the Botanic Garden, approximately six- 
ty-five diseases of the woody plants were collected. Several col- 
lections of some of these diseases were made. In a few cases, 
the same disease was collected on different hosts so that the total 
number of collections runs considerably over one hundred. 
In some cases, while diseased conditions were found on the 
trees or shrubs, no fruiting structures of parasitic fungi were 
secured. In such cases, collections were made repeatedly 
throughout the season in the hope that the fruiting stage of the 
