290 CONTROLLING INSECTS AND DISEASES 



Table 40 gives a dilution table for tar-distillate emulsions, 



TABLE 40 



Dilution Table for Tar-Distillate Emulsions* 



Percentage of Oil in Stock 

 Emulsion as Purchased 



Number of Gallons of Emulsion to Be Used 

 for 100 Gallons of Spray Mixture 



iar Oil 



Petroleum 

 Oil 



For Cherry 



Aphis 

 (2 per cent 

 tar oil) 



For Rosy 

 Aphis 

 {2}/2 per cent 

 tar oil) 



r or bcuriy fecale, 

 J3ua Moth, or 

 Oyster-Scale- 

 oneu \^y2 per 

 cent tar oil) 



95 



0 



2.1 



2.6 



4.8 



85 



0 



2.3 



2.9 



5.3 



83t 



0 



2.4 



3.0 



5.4 



80 



0 



2.5 



3.1 



5.6 



75 



0 



2.7 



3.3 



6.0 



65 



15 



3.1 



3.8 



6.9 



60 



23 



3.3 



4.2 



7.5 



50 



33 



4.0 



5.0 





40 



40 



5.0 



6.3 





37t 



46 



5.4 



6.8 





36 



44 



5.6 



6.9 





* 0.1 gallon equals approximately % pint. 



t These two oils are the ones most commonly offered for sale in New York State. 



(e) Select Materials J or a Complete Program, From his 

 knowledge of the insects and diseases to be controlled and of 

 the materials used for their control, the grower is in position 

 to make up his spraying program. He should then decide 

 which materials he will purchase and in what forms, and which 

 he will prepare himself. 



He knows that certain materials may be combined with- 

 out detriment, thus controlling more than one pest at a time 

 and reducing the number of applications needed. Others can- 



