24 CIRCULAR 6 5 9, U. S. DEPARTMENT OF AGRICULTURE 





V* 



Grimesjjolden Ej| Grimes Golden 

 Unoiied Wrapper | Qi , ed Wrapper 



Figuee 10. — Control of scald on Grimes Golden apples by use of wraps carrying 

 odorless, colorless mineral oil to at least 15 percent of their dry weight. 



after such transfer, but in such cases it is due to conditions that pre- 

 vailed during storage, just as when it is found during cold storage. 



In the prevention of scald, picking the fruit at proper maturity 

 is important ; selecting only the best-colored fruit for long-time stor- 

 age is also important, but in preventing loss from the disease further 

 measures must be taken. Since it is due to auto-intoxication effects 

 in storage, storage practices must be adapted to prevent its occurrence. 

 If it were practical to provide continuous aeration of every apple, 

 the injurious odorous emanations could be removed in this way and 

 scald control could be secured, but it is not possible to do this in com- 

 mercial packages or under commercial cold-storage practices. The 

 only feasible method of scald control is the use of oiled paper (fig. 10) 

 as developed by Brooks, Cooley, and Fisher (2). The oiled paper 

 can be used either in the form of fruit wraps or shredded. The oiled 

 paper absorbs the odorous emanations from the fruit and at the same 

 time to some extent reduces moisture loss from the fruit. Its use is 

 recommended for all fall and winter varieties of apples. For best 

 results the apples should be packed in the oiled paper as soon as pos- 

 sible after harvest. Oiled paper for this purpose is now obtainable 

 in all apple-grow T ing districts, but growers should make sure that it is 

 properly prepared and properly used. It should carry at least 15 per- 

 cent of its dry weight in an odorless and tasteless mineral oil. When 

 shredded oil paper is used, at least % pound per bushel is required, 

 and it should be well distributed through the package so that every 

 apple is in contact with it. 



EFFECTS OF PACKAGING 



Packaging practices have an important bearing on the subsequent 

 condition of apples especially as to bruising, and particularly when 

 apples are displayed to the consumer. It is a strange commentaiy on 



