New York Agricultural Experiment Station. 403 



mated at $18 per acre. This is an item of much less importance 

 however, than the difference in the market value of the fruit 

 which, as before stated, Mr. Bradley estimated at 25 cents to 

 50 cents per barrel in favor of the trees not sprayed in bloom. 

 The average yield of the trees sprayed in bloom was 12.95 

 bushels. With 48 trees per acre this would amount to 621.6 

 bushels or 207.2 barrels per acre. A loss of 25 cents per barrel 

 on this number of barrels amounts to $51.80, which combined 

 with the apparent loss in yield of |18 makes the total loss in 

 this experiment at the lowest estimate about $70 per acre. This 

 estimate is presented here to show the apparent loss from spray- 

 ing in bloom in this particular test. It is given as simply one 

 item of evidence bearing upon the general subject under investi- 

 gation. It is not supposed that it furnishes an accurate stand- 

 ard for estimating the probable loss from such treatment in 

 other localities and seasons. As stated before it is not clear 

 whether the fruit in Row 4 was smaller than that in Eows 2 and 

 3 because of the treatment or because of the location of the 

 trees. 



experiments at HILTON. 



In the orchard of Messrs. John B. Collamer and Son, Hilton, 

 Monroe County, several varieties were treated. These trees 

 were planted about 20 years ago and about 10 years ago were 

 top-worked. They average from 17 feet to 20 feet high and 

 stand 30 feet apart. Two trees of Oldenburg were sprayed in 

 bloom and two other trees which were selected as being as near 

 like these as possible were not sprayed in bloom. All of these 

 trees were sprayed alike on the west side May 4 before the blos- 

 soms opened, but after the leaf buds had opened, using Bor- 

 deaux mixture, 1 to 10, and sodium arsenite at the rate of 1 

 pound of white arsenic to 200 gallons of the mixture, which is 

 equivalent to 1 pound of Paris green to 100 gallons. 



The Oldenburg trees which were sprayed in bloom were 

 treated Saturday, May 19, about four days after the blossoms 

 began to open. After the blossoms had fallen. May 29, the cor- 

 responding trees which had not been sprayed in bloom were 



