7 ARORA 
JOURNAL 
OF 
The New York Botanical Garden 
Vou. XVII July, 1916 No. 199 
BORERS INFESTING THE ASH 
(With Plates 
of our park trees are subject to more depredation from 
os insects uae oe white ash heat americana L.). 
e it not for would be one of the most valuable 
trees for city parks as well asa as tree. + ne distri- 
ke) 
is fro sou 
Florida, Kansas and Texas. Under favorable conditions it 
attains a height of 120 feet and in aged specimens has a columnar 
form and affords a dense shade. 
Since the introduction of the leopard-moth from Europe, t 
as s to be one of the favorite trees for the harboring a 
this insect, which causes a great deal of damage especially to the 
d bi 
ts leopard-mot! the common ash-borer 
(Poise Syringae Harri - are ane rivals so far as the destruc- 
tion of the ash is concern 
SympToMs OF THE AsH-BORER 
e first evidence of the presence of the ash-borer is the ap 
pearance “ strings of sawdust-like particles and rather ia 
compact pellicles of wood. These are often present in large 
numbers and may remain in part hanging from the bark or may 
fall to the ground at the base of a tree. When the insects are 
* Jour. N. Y. Bor. GARDEN 13: 155— pl. ro 
[Journal for June (17: eles was issued ie 14, 1916} 
95 
