Plants as Affected by Animal Parasites. 



165 



soldered to the wall as shown. When it is desired to 

 spread the powder more, the disc B is used. 



For taller plants, a powder bellows is desirable. 



Liquids are best distributed with 

 a force pump, fitted with a hose of 

 a length suitable to the height of 



FIG. tin. FIG. 70. 



Fig. 69. A convenient and serviceable spray pump, using a common 

 pail for a reservoir, to which it is attached by the device shown at the left. 



Fig. 70. A similar pump with attachment by which kerosene and 

 water may be sprayed together (294). Both are made by the Deming Co. T 

 Salem, Ohio. 



the tree or plant, and with an atomizing nozzle (Figs. 69, 

 70, 71). For tall trees, the hose nozzle may be elevated 

 by attaching it to the end of a light pole. In orchard 

 spraying, the pump is often used on a wagon, and the man 

 holding the hose sometimes stands on a high platform. 

 A spray pump used on a large reservoir, needs an agitator 

 to prevent the heavier part of the spraying mixture from 

 settling. 



Excellent bellows and force pumps, designed expressly 

 for applying insecticides, are now manufactured. 



305. The Use of Insecticides. In treating any given 

 insect, the most important question to decide, is the man- 



