Nov. 15, 1919 



Nature and Control of Apple-Scald 



22 = 



Table VIII. — Effect of temperature changes upon, apple-scald: Experiment at 



Winchester, Va. 



No harmful effects of any kind were found to result from the exposure 

 of the apples to outside air. A study of the tables shows that scald was 

 either not affected or else was reduced by the treatment, the results 

 apparently depending upon the amount of aeration the apples received 

 while out of storage. In the experiment reported in Table VI, where 

 the commercial barrels were removed to rather poorly ventilated rooms 

 I to 3 times, the treatment had practically no effect upon scald, but in 

 the experiment reported in Table VIII, where similar barrels were re- 

 moved to a well-ventilated hall 8 to 10 times, scald was considerably 

 reduced. While the aeration reported in Table VI was apparently too 

 slight to affect the apples in the commercial barrels, the same treatment 

 resulted in a decided reduction of scald in the ventilated barrels, the 

 difference apparently being due to the better aeration secured by the 

 more open package. It is interesting to note in Table VI that while 

 the aerations given at the end of the seventh week of storage decidedly 

 decrease scald, those at the end of the eleventh week had but little 

 effect upon the disease. This is in agreement with data reported in an 

 earlier publication (5), indicating that with Grimes apples aerations must 

 be made during the first 8 or 9 weeks of storage in order to have any 

 beneficial effect upon scald. 



The barrels removed from the storage rooms were exposed to more 

 breezes than those that remained, but the aeration received by the 

 apples which were moved was doubtless greatly increased by the air 

 currents set up as a result of the difference between the temperature of 

 the fruit and that of the outside air. 



AIR-COOLED STORAGE 



Experiments were made to determine the comparative development of 

 apple-scald in air-cooled and cold-storage plants. The results are given in 

 Tables IX and X. The apples used in the experiment recorded in Table IX 

 were from Winchester, Va. Three barrels of each variety were used under 

 each condition. The Arkansas apples were stored October 18, and the 

 final notes taken February 3; the Yellow Newtown stored October 25, 



