An Apple Orchard Survey of Ontario County 



201 



TABLE 30. Summary of Orchards Sprayed and Uxsprayed 



No. of applications 



Xo. of 



Per cent 



One 



Two 



Three 



Four 



Total sprayed 

 None 



The chief spray mixture is bordeaux, a spray intended to combat 

 fimgous diseases. Less than a third of the orchards are reported as using 

 mixtures containing arsenical poisons intended for che\ving insects.* 

 Yet Table 29 shows that these insects are ver}* prevalent. Only 23 or- 

 chards are reported as using sprays, such as lime and sulfur, scalecide, 

 and kerosene emulsion, that are inimical to sucking insects. This, no 

 doubt, accoimts for the large nimiber of orchards infested ^^'ith oyster 

 shell scale. 



Bordeaux mixture is appHed chiefly in the proportion 3-3-50, although 

 4-4-50 and 4-6-50 are used to a considerable extent. Some of the other 

 proportions used are stated in Table 32. 



The reports concerning the effect of spra^-ing show good results in 80 

 per cent of the orchards, while only 15 per cent report injiu^'. The hand 

 pump seems to be the favorite type of sprayer, being used in 134 orchards. 

 Power sprayers are used in 34 orchards. 



TABLE 31. Summary of Spraying Conditions and Practices 



* It is interesting to note that the orchards sprayed four times with bordeatiz were sprayed also with 

 arsenical poisons. 



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