46 MISC. PUB. 526, U. S. DEPT. OF AGRICULTURE 
Figure 6.—Traction sprayer in operation. The nozzles are arranged so as to 
cover the entire plant with liquid insecticides. When poisonous sprays are 
being used, the operator should use full face and respiratory protection. 
(figs. 7 and 8) for use in orchards and parks, which have a tank capac- 
ity of 400 gallons or more and multiple-cylinder pumps which 
maintain pressures up to 800 pounds. 
Figure 7.—Large power sprayer in action, with home-made boom attached and 
carrying 56 nozzles. : 
The small outfits are usually pulled or pushed by a workman and 
are used in small commercial plantings of vegetables, ornamentals, and 
small fruits, and in greenhouses. The larger types are either horse- or 
tractor-drawn, or they may be self-propelled. 
For use on row crops the nozzles are usually attached to a fixed boom 
(figs. 6 and 7) and are adjusted to spray the plants thoroughly. To 
spray trees or shrubs (fig. 8) one or more lengths of hose are attached, 
and the spray is directed as desired by an operator who manipulates 
the spray gun or spray “broom.” 
