54 INSECTICIDES AND SPRAYING 



which has been found most serviceable in experimental work. It 

 is an excellent apparatus for a few small trees, garden vegetables, 

 and other plants and shrubbery. Tall trees may be sprayed from 

 a home-made tower as shown in figure 80, or with a more modern 

 apparatus, run by gasoline power, shown in figure 81. Low plants 

 in acreage amount, like large fields of strawberries, for example, 

 are well handled with an outfit as shown in figure 82, or its 

 equivalent. 



Hose and Extension Rod. Connections of good hose are im- 

 portant, and poor hose should be avoided; three-ply and four-ply 



FIG. 78. Barrel pump with cart. 



are generally used, but where great pressure is to be needed, five- 

 or even six-ply is desirable. Hose can be bought of any length. 

 Where trees of some height are to be sprayed, extension rods are 

 necessary (Fig. 83). These extension rods can be bought of various 

 lengths, and consist either of metal pipe alone or the same encased 

 in bamboo. To the ends of this the hose and nozzle are attached. 

 Drip guards which encircle the extension just below the nozzle, or 

 just above the point where it is held, will add to the comfort of 

 the man spraying. These guards catch liquid which would other- 

 wise run down the pole upon his hands. 



A nozzle which can be readily cleaned is important, and one 



