328 CONTROLLING INSECTS AND DISEASES 



TABLE 41 



Measurement of Types of Spray Produced by Various Equipment 

 When Operated at Pump Pressures of 250, 300, and 400 Pounds 



Note. — Except as noted, 50-foot lengths of 3^-inch hose were used. 







Pressure, 



Pressure, 



Pressure, 





Spray 

 Disk 

 Open- 

 ing 



250 Pounds 



300 Poimds 



400 Pounds 



Equipment 



Volume 



per 

 Minute 



Spray 

 Drive 



Volume 



per 

 Minute 



Spray 

 Drive 



Volume 



per 

 Minute 



Spray 

 Drive 





Inch 



Gallons 



Feet 



Gallons 



Feet 



Gallons 



Feet 



1. Four nozzles. . 



He 





12 





15 



^y2 



16 



2. Four nozzles. . 



H2 





12 





15 





17 



3. Four nozzles. . 



Ho 



Vk 



He 







8y2 



15 





18 



4. Four nozzles. . 







t 

 13 



5. Three nozzles . 





10 





13 



6. Three nozzles. 



H2 





10 



5 



13 



6 



13 



7. Three nozzles . 



Ho 

 Vs 







6^ 



13 





14 



8. Three nozzles . 









? 





9. Double gun . . 



H2 





11 



13 





15 



10. Double gun . . 



Ho 



5% 



11 



&%* 



15 



7^8* 



17 



11. Double gun . . 



Vs 



8 



11 





15 





17 



12. Single gun 



H2 





9 



2V4. 



10 





12 



13. Single gun 



Ho 



3 



9 



Ws 



11 





12 



14. Single gun. . . . 



Vs 



5H 



12 



5H 



13 





13 



* Five-eighths inch hose, 50-foot length. 



t Spray coarse and hfeless, drive very weak. 



hands of the operator. A wet rod is difficult to handle, and the 

 material may make the hands sore if they are soaked in it 

 continuously. 



For peaches, sour cherries, and small trees, a rod 6 to 8 

 feet long is sufficient. A 10-foot rod is needed for apples in 

 bearing, and a 14-foot rod may be required if the trees are 

 high. Very short rods are sometimes convenient for spraying 



