342 



CONTROLLING INSECTS AND DISEASES 



Agitator paddles 

 Cylinder-head gaskets 

 Connecting rods 

 Disks for nozzles 

 Gaskets for nozzles 

 Hose clamps 

 Hose connections 

 Hose washers 

 Nozzles 

 Pistons 

 Plunger cups 



Pump packing 



Repair tools 

 Spark plugs 

 Spray hose 

 Spray rods 

 Stove bolts 

 Suction hose 



Suction strainer for hose 



Valve balls 

 Valve seats 



Valve springs 



Parts should be classified and stored in separate compart- 

 ments, and those subject to corrosion should be protected by a 

 coating of hea\y oil or grease. 



For very extensive operations, a complete extra outfit or an 

 extra engine and pump with all connections should be held in 

 reserve. 



(6) Applying Spray Materials. The careful orchardist will 

 plan his organization of labor and the function of each work- 

 man thoroughly before the machine goes into the orchard. An 

 outfit capable of carrying one lead of hose will require two 

 men, one to spray and the other to drive team or tractor. A 

 boy may do the driving, and many a good workman in the 

 orchard has served his apprenticeship in this way. With a 

 large capacity outfit carrying two leads of hose, three persons 

 will be needed. If the trees are large, one man should spray 

 from the tank and the other from the ground, making the ap- 

 plication from both sides of the row. A tower will be needed 

 for tall trees. The men can alternate work so as to distribute 

 the more difficult roles fairly between them. 



AVith extra-large machines carrying three leads of hose, 

 an arrangement of one man to a row on the ground and one 

 man on the tower^ covering the tops of both rows, works well 

 when the rows are sufficiently close together. 



A spraying method that has given satisfaction is for the 

 man on the ground to spray the inner parts of the tops first. 

 This eliminates the necessity of walking in under a dripping 



