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 



FIG. 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 



