Feb. s4, 1919 



Apple-Scald 



207 



ments were reported in which scald was entirely prevented on Grimes 

 apples at 15° C. by drawing the air rapidly through the container for 

 a lo-minute period three times a week. During the past season this 

 experiment was repeated but at 5^ C. and with York Imperial and 

 Arkansas apples. The amount of apple- scald developed after 20 weeks 

 is given in Table VII. 



Table VII. — Effect of intermiftent aeration on apple-scald 



The control of apple-scald was not as complete as in the earlier experi- 

 ments, but a limited amount of air had a greater beneficial effect when 

 passed into the container within a period of 10 minutes than when dis- 

 tributed over a period of 48 hours. 



With a slow rate of air movement the amount of scald was found to 

 vary with the length of time the movement was continued, as shown in 

 the results given in Table VIII. 



Table VIII. — Relation of period of aeration to the development of apple-scald 



Ex- 

 peri- 

 ment 

 No. 



\'ariety and previous treatment. 



Treatment. 



Percent- 

 age of 

 scald. 



A I 



A2 

 A3 



Bi 



B2 

 B3 



Grimes apples of same lot as de- 

 scribed in legend for figure 6 

 after 9 weeks' storage at 15° C. 



....do 



....do 



Grimes apples of same lot as de- 

 scribed in legend for figure 7 

 after 18 weeks' storage at 0° C. 



....do 



....do 



In moist chamber continuously.. 



In open continuously; air move- 

 ment yi to X miles per hour. 



Alternately 2 weeks with same 

 treatment as No. i, then 2 weeks 

 as No. 2. 



In moist chamber continuously . . 



In open continuously; air move- 

 ment >i to X miles per hour. 



Same treatment as No. i for 8 

 weeks, then same as No. 2. 



65 



iT 



o 

 20 



The rate of air movement was probably but little above the minimum 

 for scald prevention, and the results show a direct relation between the 

 duration of the movement and the amount of apple-scald. 



