22 



FUXGI AXD FUNGICIDES 



and in tlie latter by means of some form of spraying 



pump. In both cases it is important that they be finely 



divided and evenly distributed. 



There are many forms of spraying 2:)umps uj^on the 



market. In general they are of four sorts : The bucket 



l^umj^s, the knapsack 

 sprayers, the barrel spray- 

 ers, and the geared auto- 

 matic machines. The 

 form of tlie knapsack 

 sprayer is shown in Fig. 8. 

 It is useful in some cases, 

 but in general the carry- 

 ing of the reservoir and 

 contained liquid should 

 not be imposed on liuman 

 shoulders. A convenient 

 barrel outfit is shoAvn in 

 FIG. 8. KNAPSACK sPKAYER. ^jg. 9. The barrel has 



upon it a double discharge pump, to which are attached 

 two lines of hose, provided Avith good nozzles, and fas- 

 tened at the end to poles. Three men oi3erate the ma- 

 chine, one driving and j^umping, and two directing the 

 spray. 



Many different kinds of sj^ray nozzles are also offered 

 for sale. In several cases, at least, each has a peculiar 

 value for certain lines of work. Consequently the fruit- 

 grower who has a variety of vines and trees to spray 

 should own four or five nozzles, and use the one best 

 adapted to the work in hand. Some of the best forms 

 are the Improved Yermorel, Climax, Cyclone, Graduat- 

 ing Spray, Mason, and Improved McGowen, ]^o. 7. 



Professor L. H. Bailey uses, for bushes and vines 

 which need to be sprayed on the under surface, the 

 cyclone nozzle, in connection with a home-made wheel- 

 barrow tank, as shown in Fig. 10. A piece of rubber 



