ORCHARD SPRAYING EXPERIMENTS 11. 23 



sible errors in methods of examination. It could doubtless 

 have been reduced two-thirds with adequate equipment and 

 more open growth of tree. 



The Coburn Orchard. 



Here were selected 12 scattered trees of four varieties— -4 

 Mcintosh, 3 Baldwin, 3 Greening and 2 Ben Davis. With the 

 exception of 2 Mcintosh trees standing in the corner of an oat 

 field, the trees were in sod. 



The applications here also were made with a hand pump, but 

 with longer leads of hose and longer spray rods than in the case 

 aforementioned. The barrel was mounted on a stone boat, 

 which allowed a closer approach to the trees, and the applica- 

 tions were in consequence somewhat more satisfactory than in 

 the Philbrook plot. 



The application before petal fall had to be omitted here, as 

 the period of bloom was too near at hand to warrant risk of 

 injury to the flowers. The first application, therefore, was 

 after petal fall, on May 31. The second and last was on June 

 16. 



Results. No spray injury to foliage or fruit was observed 

 during several inspections throughout the season. A very 

 moderate amount of sunscald was noted on Baldwin and Green- 

 ing apples and considerably less on Mcintosh and Ben Davis. 



On August 30 the fruit in general was excellent in appear- 

 ance ; foliage likewise, except that there was increasing evidence 

 of the blister mite (Eriophyes sp.). On one or two fruits of 

 Mcintosh, an exceptionally susceptible variety, scab was noted: 

 in small amount. 



The Kcyscr Orchard. j 



Twenty-four vigorous bearing trees in two rows of 12 trees 

 each were here selected, consisting of 19 Baldwins, 3 Green- 

 ings, and 2 Ben Davis. The aisle between these rows had been 

 used as a garden and cultivated for 7 years; the bounding aisles 

 had been cultivated every other year during the same period 

 and seeded to clover. The year of the experiment the entire 

 block was plowed about June i and cultivated up to July 6. 



The first application occurred on May 31, as here also the 

 early spraying before buds opened had to be omitted. Both 

 this application, as well as the last on July 21 were made with 



