FUNGICIDES, PREPARATION AND APPLICATION 441 
done rapidly. Dusting can be done in much less time. Spray- 
ing will be much more thorough if done against, rather than 
with, the wind. Use a nozzle set at an angle of 60° on a ten- 
to fourteen-foot pole with a pressure of 175-200 pounds be- 
hind it. The spray should be fine and the nozzle should be 
Fic. 126. — Apple-blossoms in proper stage for the second applica- 
tion of a fungicide. 
moved along carefully and intelligently over every limb and 
branch. Where trees are fifteen feet or more in height, spray- 
ing should be done from a tower, and where the trees are very 
large, a man on the ground with a trailer will be necessary to 
cover the low-hanging limbs and lower inner branches. In 
spraying against the wind hold the nozzle at such a distance 
from the limb to be sprayed that the spray will come just where 
the wind breaks the force of the spray. Where spraying is 
done with the wind a second application after the wind changes 
is necessary. This is usually too late to be effective and re- 
quires double the time and material. Dusting is done with 
