212 



Journal of Agricultural Research 



Vol. XVI, No. 8 



scald varied with the length of time held under cold-storage conditions. 

 Apples shifted in either direction during the first 9 weeks of storage 

 seemed to derive a benefit from the shifting itself, thus furnishing further 

 evidence that temperature changes may aid in removing scald-producing 

 agencies. 



VENTII.ATION IN COMMERCIAI^ COI.D STORAGE 



Experiments were made to determine the effect upon the development 

 of apple-scald in cold storage of different kinds of packages and different 

 amounts of air circulation. The results are given in Table XI. 



Table XI. — Influence of package and ventilation upon the development of apple-scald 



in cold storage 



Experiment A. — The apples used were Grimes, from Virginia, picked on Septem- 

 ber 7, and placed in commercial cold storage September 8. Part were packed in tight 

 barrels and part in boxes. The apples were removed from storage on December 19, 

 the packages opened, and held at a temperature of 18.3° C. (65° F.) for three days. 



Experiment B. — Arkansas apples from Middletown, Va., picked on October 17, 

 and stored in commercial cold storage on October 18, were used in this experiment. 

 Part of the apples were packed in tight barrels of the usual commercial form and the 

 others in similar barrels with holes for ventilation. Fifteen slits f^ inch by 4 inches 

 were cut in each barrel. The apples were removed from storage on February 18 and 

 held at a temperature of 20° C. (68° F.) for three days before taking the final notes. 



In all cases the open packages had less scald than the tight ones, 

 averaging about half as much. With the Grimes apples held in an 

 unventilated storage room the fruit in the boxes was scalded practically 

 as badly as that in the barrel; but in those held in a poorly ventilated 

 room the box apples were practically free from scald. 



Further evidence of the beneficial effects of storage ventilation is 

 found in experiment B4 (Table XI), the apples in the room without 

 ventilation having twice as much scald as those in the room having an 

 occasional airing. 



