340 
old trees of mixed varieties, Ben Davis and Grimes predominating. 
There was a uniformly heavy infestation of the scale throughout the 
orchard, all trees showing some limbs incrusted. The majority of these 
trees would probably not have survived the season of 1920 if no treatment 
had been given. 
MateriaAts UseEp 
The materials used and the strength of each spray were as follows: 
Commercial concentrated lime-sulfur 33° Baumé, 1 gallon to 8 gallons of 
water 
Scalecide, 1 gallon to 15 gallons of water 
B. T. S., 14 pounds to 50 gallons of water 
Niagara soluble sulfur, 12% pounds to 50 gallons of water 
Sherwin-Williams dry lime-sulfur, 15 pounds to 50 gallons of water 
Dow dry lime-sulfur, 15 pounds to 50 gallons of water 
TIME AND METHOD oF APPLICATION 
Barry Orchard—tThe sprays were applied March 28, 1919, with a 
“Bean” duplex power outfit at a minimum pressure of 250 pounds. There 
was a brisk west wind which made it necessary to use a spray gun in 
order to make the application from all sides of the trees. The tops 
of the trees were covered by a rod, and whirlpool disc nozzles were 
operated from the tower. The gun was operated from the ground. 
The weather was warm and the first leaves were beginning to show 
green. About nine gallons of material were used to each tree. 
Quincy Orchard.—The sprays were applied March 27, 1919, with a 
“Friend” power outfit, using from 250 to 275 pounds’ pressure. The 
tops and upper sides of the branches were sprayed with a gun from the 
tower, the under sides being covered with a rod used from the ground. A 
third man stood at a little distance from the sprayer to call attention to any 
parts of the tree that were missed. In this way, a very thorough appli- 
cation was made to all parts of the trees, about eleven gallons of solution 
being used per tree. 
The weather was warm, with bright sun and a light wind. The 
leaf buds were just bursting, nearly all of them showing a little green. — 
RESULTS 
The orchards were graded July 21 and 22 by both experimenters, 
working independently, neither knowing the kind of treatment applied 
to the plots except in the orchard under his personal supervision. Each 
tree in a given plot was graded separately, and-a general average for 
the plots was determined. The results were then compared and tabulated 
as shown in the following table. 
ee. 
