Bae POS oCALL INVESTIGATIONS. TV 
V. H. Lowe Anp P. J: Parrott. 
SUMMARY. 
Experiments with the lime-sulphur-salt wash conducted in 
orchards located on Long Island, in the Upper Hudson Valley, 
and in Ontario and Niagara counties gave uniform results indi- 
cating that this wash is a safe and reliable remedy for the San 
José scale in the East. 
Experiments with the wash sprayed upon infested apples in 
the laboratory showed that it kills the insects in two ways: 
First, directly through its soluble compounds and probably very 
soon after coming in contact with them, thus acting as a contact 
poison; and, second, indirectly through its insoluble or~slowly 
soluble compounds which form a crust preventing the develop- 
ment of the young scales. 
Summer treatment with lime-sulphur washes resulted in kill- 
ing the scales without injuring the trees (Japan plum trees) 
with the sulphur in the proportion of one pound to ten pounds of 
lime. 
Experiments in making a lime-sulphur wash by using caustic 
soda or potash, to avoid the necessity of boiling, gave promising 
results. This wash is intended to take the place of the standard 
lime-sulphur-salt wash. Further experiments are necessary to 
determine its value. 
Experiments were made with various other washes including 
resin washes, lime-water and kerosene wash, lime-sulphur-salt 
wash and casein, and potash-sulphur wash, with the result that 
none of the compounds tested gave better results than the lime- 
sulphur-salt wash. 
*A reprint of Bulletin No. 228. 
