138 



Control of Parasites 



Fig. 51. — Triple spray 

 ' ' Vermoral ' ' nozzle. 



To have the spraying properly and 

 thoroughly done is not always easy, 

 especially with large trees and incom- 

 plete apparatus. 



For private grounds of limited extent 

 a fifty-gallon cask or tank with a 

 strong, double-acting force pump' (the 

 working parts of bra.ss and the valves 

 also of metal), having an air cylinder 



of one and a half inches or more, and a stroke of five inches 



or more, attached to the top or 



side of the barrel, mounted on 



a cart, with fifty to one hundred 



feet of half-inch white cotton or 



rubber hose, ladders and lifting 



poles of bamboo or quarter- 

 inch gas pipe, will answer well 



enough for apparatus. The 



entire outfit, exclusive of the 



cart, costs between $30 and $40, 



the pump alone costing from 



$10 to $15. A barrel pump, 



satisfactory for general work on 



small places, can be had for 



$15, and a bucket pump, which 



can be used with an ordinary 



pail or bucket, good to spray 



bushes and small trees, may 



be had for from $3 to S7, 



including rubber hose and nozzle. 



The most important feature in the apparatus is the nozzle, 



Fig. 52. — Bucket pump with 

 tank for oil. 



' Knapsack pumps, of which there are scvcnil makes in the market, 

 are, as a rule, not practical for tree work. 



