INJURIOUS AND BENEFICIAL INSECTS OF CALIFORNIA. 



477 



Slake the lime thoroughly in (1) ; dissolve the salt and sulphate of 

 zinc in two gallons of water (2) ; pour (2) into (1) and add (3). Mix 

 thoroughly. Two pounds of flour paste (dissolved iu 2 gallons of 

 hot water) may be added instead of the skimmed milk. 



THE APPLICATION OF SPRAYS 



EQUIPMENT 



The proper application of any spray is without doubt the most 

 important factor in all spraying work. A very poor product well 

 applied often gives much better results than a good product poorly 

 applied. How much better, then, the thorough application of a reli- 

 able product. 



Pumps. — The procuring of a good pump is the first step. In this 

 the purchaser must be guided entirely by the amount of spraying he 

 has to do. For small yards and gardens or for young orchard trees 



Fig. 476. 



-A power spraying machine for general orchard work. 

 Spray Pump Company) 



(Courtesy Bean 



the ordinary foot and bucket pump is satisfactory. The knapsack 

 pump is also a convenient apparatus, especially for spraying young 

 orchard trees where there is much walking and little spraying. 



For small orchards of from five to ten acres hand pumps with 

 pressure tanks and from one to two leads of hose, such as shown in 

 Fig. 477, do very well and give complete satisfaction if great care 

 is taken to keep the solution in the tank well stirred and the appli- 

 cation is made thorough. The absence of an agitator is a ureal 

 handicap to any hand machine, especially if oil sprays or arsenicals 

 are used. 



For orchards of from ten to twenty acres small power pumps are 

 adequate, but even in such orchards a good power machine will pay 

 for itself in a very short time. High pressure and thorough agitation 



