Apple Orchard Survey of Niagar^x County. 



307 



"A part of the difference in yield and income is due to other factors. 

 The unsprayed orchards are hkely to be somewhat neglected in other 

 respects. To eliminate this factor, another classification was made after 

 all neglected orchards were thrown, out. 



" The second table includes only those orchards that are fairly well 

 cared for. They are not badly diseased or damaged from any cause. 

 This shows a marked difference in the percentage of the crop barreled 

 and in average yield and income, the average income per acre being: 

 unsprayed, $103; sprayed once, $139; sprayed twice, $143; sprayed 

 three times, $184. Allowing for the cost of the extra barrels required, 

 for the cost of spraying and for a possible difference due to other causes 

 than spraying, there is certainly enough difference left to give a large 

 profit from the practice." 



Spraying for the scab. — Spraying influences in a very material way the 

 character of the crop and the amount of income. As the writer has pre- 

 viously noted, the summers of 1906 and 1907 were so dry that very little 

 scab developed, and for this reason no computation in Niagara County 

 was made to show the relation of scab to income. In view of this fact 

 it seems well to publish the table formulated for Orleans County. It 

 will be seen from this table that the greatest income comes where there 

 is little scab. For example, associate 0-5 per cent scab with an 

 average income per acre of $143, and contrast this wath 76-100 per 

 cent scab with an average income per acre of $88. 



XVII. Relation of Scab to Income and Yields, Orleans Co., 1904 



PER CENT OF SCAB. 



o- 5 



6- 25 



26- 50 



51- 75 

 76-100 



Average yield 



per acre — 



bushels. 



382 



325 

 284 



248 



Average 



income per 



acre. 



>I43 

 102 



105 

 87 

 88 



Per cent 



of the crop 



barreled. 



81 



75 

 72 

 68 

 70 



To control the scab, spray with Bordeaux mixture 3-3-50 at the periods 

 indicated on page 309 for codling moth. 



Spraying for scale. — Spraying for San Jose scale has not been very 

 generally practiced, and because of this fact the insect is gaining ground 

 every year. The infested area extends from La Salle to Niagara Falls, 

 throi'gh Lewiston and Youngstown to Wilson, and includes a few 

 orchards in Olcott and Lockport. In this area over seventy-five per 



