360 CONTROLLING INSECTS AND DISEASES 



2. Put these control measures together into a schedule or program 

 for the season. 



3. Study the spray outfit as to cost, type, power of engine, capacity 

 of pump, durability, ease of handling, accessibility of parts, ease of 

 obtaining repair parts, type of gun or nozzle, pressure employed. Inves- 

 tigate facilities and devices for saving time in mixing materials and 

 filling spray tank and for keeping machine at work continuously. If a 

 duster is used, get growefs^ opinion of its place in the spray program, 

 the costs as compared with liquid spraying, and the effectiveness of 

 control. 



4. From the foregoing information, compute the actual spraying costs 

 in the various orchards. 



5. Prepare a brief life history of the important insects and diseases 

 of the section. 



Secure from the local state experiment station or college of agricul- 

 ture the latest information concerning control measures and materials. 



6. With this information, suggest improvements in the growers' pro- 

 grams as to materials used, method and time of application and refine- 

 ments in the machine itself that will give more effective service. 



7. Work out a complete spray schedule for an average season, with 

 costs, for a 20-acre unit. 



