Insecticides, Fungicides and Spray Machinery 175 



hauled through the field on a wagon, cart or slide. One 

 man is needed to pump and keep up pressure, while an- 

 other manages the nozzle. In buying a barrel pump, 

 the following suggestions should be kept in mind: (1) 

 The pump should be guaranteed to furnish 80 to 100 

 pounds of pressure with four nozzles running; (2) it 

 should have a large air chamber within the barrel and 

 not projecting above it; (3) as many working parts as 

 possible should be inside the barrel, as exposed parts are 

 easily broken; (4) the cylinder, plunger, valves, and 

 all working parts should be made of brass, the handle 

 and other parts of malleable or galvanized iron; (5) 

 there should be a good mechanical agitator of the paddle 

 type; (6) the pump should be so attached to the barrel 

 that it may be quickly removed for repairs; (?) valves 

 and their seats should be easily removable for cleaning. 

 Power outfits. — For the commercial growers who pro- 

 duce many acres, power outfits might be used. How- 

 ever, it should be ascertained first that the barrel type 

 pump will not do the work. Power sprayers should be 

 mounted on substantial trucks with wheels that may be 

 set in or out to fit different width rows. These outfits 

 should easily run six to eight nozzles so that several rows 

 may be sprayed at the same time. All the working 

 parts of the machinery should be easily accessible for 

 repairs. Often the most simply cojistructed outfits give 

 the best satisfaction. However, a cheap pump is not 

 satisfactory and one should buy of a standard company. 



Dusters. 



Often dusting will answer the same purposes as spray- 

 ing and the work can be done much faster. For the 

 farmer who has a few acres, a simple duster or powder- 



