SELECTING MACHINERY AND EQUIPMENT 311 



It should be kept in mind that fruit growers have been 

 working with liquid sprays and accumulating experience con- 

 cerning them for a long time. This is not to be lightly cast 

 aside. However, when the same study and attention have 

 been accorded the use of dusts, the results may bring about 

 radical changes in control methods. 



With the foregoing facts in mind and with a knowledge of 

 the comparative results of dusting and spraying attained by 

 both experimental agencies and growers in the section where 



(John Bean Mfg. Oo.) 



Fig. 103. The usual method of assembly of a spray outfit, with engine 

 at the rear, pump in center, and tank in front. 



his fruit enterprise is located, the grower is ready to make his 

 decision between the two methods of application. It is evi- 

 dent that, though the decision is in favor of spraying as the 

 usual means of control and at present the exclusive means dur- 

 ing the dormant season, the duster may still be highly desir- 

 able as a supplemental agency to cover the planting quickly 

 when the time factor is all-important or when labor is scarce. 

 Thus, although most growers own at least one good sprayer, 

 using it for dormant and early foliage sprays, many of them 

 also own a duster, using it extensively for the regular summer 



