FUNGI AND FUNGICIDES 



and in the 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 pumps upon the 

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



pumps, the knapsack 

 sprayers, the barrel spray- 

 ers, and the geared auto- 

 matic machines. The 

 form of the 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 human 

 shoulders. A convenient 

 barrel outfit is shown in 

 Fig. 9. The barrel has 

 upon it a double discharge pump, to which are attached 

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

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

 chine, one driving and pumping, and two directing the 

 spray. 



Many different kinds of spray 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 Vermorel, Climax, Cyclone, Graduat- 

 ing Spray, Mason, and Improved McGowen, No. 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 



FIG. 8. KNAPSACK SPRAYER. 



