JFL ARIR MIE EET 
A Lecanium Scale Infesting Plum Trees in 
Western New York. 

In obedience to a summons from the Director of the Station, 
the Entomologist came to Geneva November 9, 1894, to study the 
life history and habits of the “Plum Scale” and to conduct a 
series of experiments with a view to determining a practical 
method of combatting this pest. 
The work has not yet progressed far enough to enable the 
Entomologist to give a detailed account of the life history and 
habits of this insect as a result of his own investigations. Only 
a brief outline of the experiments is herein given. 
The experiments were conducted in the orchards of Maxwell 
Brothers, of Geneva, and T. Smith & Sons, of Hector, N. Y., 
these gentlemen having kindly granted the use of a number of 
their trees for this purpose. 
* Insecticides used.— Thus far kerosene emulsion is the only 
insecticide used in these experiments, as it is considered here in 
the east to be one of the cheapest and best remedies for this class 
of insects. It is a powerful external irritant and is commonly 
used as an insecticide in cases where internal poisons can not be 
applied to advantage. 
As will be seen, the emulsion was used at strengths ranging 
from one part of the emulsion to four parts of water to one 
part of the emulsion to 15 parts of water; the object being to 
determine the strength necessary to kill the insects. 
Method of application.— The emulsion was applied in the 
form of a spray. No power sprayers were used in this work as 
*The emulsion was made in a similar manner to that described on page 413 of bulletin 750f ~ 
this Station. 
