16 



TREATMENT APPLIED. 



Row ISTo. 3 was left as a check and received no treatment. 



Rows 4, 5, 6, and 7, all being of the Stark variety, were sprayed 

 with Bowker's disparene or disparene and Bordeaux mixture, as is 

 shown in Table II. In all cases the Disparene used was applied at 

 the rate of 3 pounds, and the Bordeaux mixture was made by using 

 4 pounds of copper sulphate and 4 pounds of lime to each 50 gallons 

 of water. 



The treatment of these rows was placed in charge of two of my 

 assistants, Mr. H. J. Speaker and Mr. Addison Hyde, both of whom 

 have had long experience in applying insecticides, and are particu- 

 larly careful and painstaking in their work. The first spraying was 

 made by Mr. Speaker, Ma} r 8 and 9, and the last two by Mr. Hyde, 

 May 22 and July 13. 



Row 4 was sprayed with disparene as soon as the blossoms had 

 fallen, and a second spraying with the same material was applied 

 July 13, about nine weeks later. 



Row 5 was sprayed in the same manner, except that Bordeaux mix- 

 ture was added at the first spraying. 



Row 6 received three sprayings with disparene, the first being made 

 as soon as the blossoms had fallen, the second two weeks later, and 

 the third on July 13. 



Row 7 was treated in the same manner as row 6, except that Bor- 

 deaux mixture was added to the first two applications. 



Rows 1, 2, 8, 9, and 10 were sprayed by Mr. Hudson immediately 

 after the spraying was completed on the other rows. He treated the 

 trees in his own way, and also sprayed the balance of the orchard. 

 For the first two sprayings arsenate of lead was used, which he made 

 from the raw materials, but for the third spraying the use of this 

 material was discontinued and disparene was applied at the rate of 3 

 pounds to 50 gallons. Bordeaux mixture was used with the first and 

 second spraying*. 



The formula used by him for making this arsenate of lead was: 

 Thirteen ounces of arsenate of soda and 33 ounces of acetate of lead 

 to each 50 gallons of spray. The salts were weighed out in these pro- 

 portions and placed in paper sacks, so that they could be dissolved in 

 separate quantities of water and placed in the spray tank when needed. 



