46 



MISC. PUB. 5 2 6, V. S. DEPT. OF AGRICTXTURE 



Figuee 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. 



(fig. 7) for use in orchards and parks, which have a tank capacity of 

 400 gallons or more and multiple-cylinder pumps which maintain pres- 

 sures 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 

 (fig. 8) and are adjusted to spray the plants thoroughly. To spray 

 trees or shrubs, one or more lengths of hose are attached, and the 



