New York AGRICULTURAL EXPERIMENT STATION. 225 
Soaps often show considerable variation in their composition. 
For this reason the orchardist should watch the results of the 
applications and determine what amount may be safely employed 
for the destruction of the psylla. One pound of hard soap, such 
as Leggett’s Anchor Brand, is commonly used to four gallons of 
water. 
Sulphur washes.—These are promising remedies for this pest, 
and are especially recommended for the treatment during dor- 
mant season of trees infested with both the scale and pear psylla. 
The experimental orchards treated this spring were remarkably 
exempt from the first brood of the psylla, while the checks (un- 
treated trees) were much infested. These sprays kill many of 
the adults and are apparently destructive to the newly hatched 
nymphs. Directions for preparing these washes may be obtained 
upon application to the Station, Geneva, N. Y. 
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