SPRAYING AND DUSTING APPARATUS 



73 



FIG. 50. 45-de- 

 gree elbow for 

 attaching noz- 

 zles to end of 

 rod for orch- 

 ard spraying. 



insect and disease control can be secured with them. The spray 

 gun is used without a rod, it being long enough to be handled 

 without the rod. 



Extension rods. In orchard spraying where the spray gun is 

 not used an extension rod is a necessity. This 

 may be a bamboo rod with a brass or aluminum 

 pipe inside, or it may be merely an iron pipe, 

 one-fourth inch size. Lengths used vary with the 

 size of the trees, ranging from eight feet to twelve 

 feet. It is well to insist on a rod of sturdy con- 

 struction when purchasing as one which is likely 

 to pull apart at the connections and leak is a 

 nuisance. 



Where the angle type of nozzle is not used it is a good plan to 

 connect the nozzle with a 45-degree elbow in order that the spray 



may be more easily directed 

 toward the tree. 



For low-growing bushes 

 and truck crops a short rod 

 with the nozzle attached at 

 right angles will be found 

 useful as it will enable one 

 to spray the under side of 

 these plants. 



Spray hose. Use only the 

 best spray hose obtainable. 



^HH&tN'f *-\ The one-half inch size is most 



commonly used for orchard 

 spraying. This should be 

 guaranteed against a work- 

 ing pressure of 300 pounds. 

 Where a spray gun is used it 

 is necessary to have three- 

 quarter inch hose of still higher capacity. Quarter or three- 

 eighths inch sizes are used for bucket pumps. 



A common mistake is using hose leads which are too short. 

 Twenty-five feet should be the minimum and fifty feet is better. 

 This enables the operator to get around the tree and to keep far 

 enough away from the outfit so that the spray will not blow over 

 the driver, sprayer and team. 



'^"^ 



FIG. 51. Spraying squash with undar- 

 spray nozzle at right angle to rod. 



