340 



CONTROLLING INSECTS AND DISEASES 



He will try to keep his investment and overhead charges as 

 low as is consistent w^ith satisfactory performance and service. 

 He wdll give preference to standard outfits of proved ability 

 and those for which repairs and service are readily available. 

 He will keep in mind that outfits that will do what he requires 

 of them w^ell within their resources and without undue strain 

 constitute better investments than those constantly crowded 

 to the limit. The delivery required of the machine should be 

 2 to 4 gallons less than its actual capacity if it is to have a 

 long period of satisfactory service. If it requires more 

 than five to six days to cover the orchard with a liquid 

 sprayer, the grower needs more machines or machines of 

 greater capacity. 



In addition to the facilities actually needed under normal 

 conditions to do the work at the proper time in the right way is 

 the question of what facilities the grower ought to have in 

 reserve as an insurance against emergencies and seasons when 

 the weather seriously cuts down the period of effective applica- 

 tions. He has in mind the actual and probable future labor 

 supply and its quality, upon which he must depend. His selec- 

 tion is based on a knowledge of his own orchard conditions 

 and problems, and on judgment carefully formed in the light of 

 them. 



5. Applying Materials. The control program may break 

 down at the point of application of the materials. Adequate 

 machinery and equipment, proper materials, and a careful 

 observance of the time limits for their effective use may fail 

 to achieve satisfactory results because of incomplete plans and 

 faulty methods of application of the materials. 



Procedure : 



(a) Planning facilities. 



(6) Applying spray materials. 



(c) Applying dust materials. 



(d) Caring for machines and equipment. 



