Currently, very few studies have investigated possi ble nonchemical control of scald during storage. It is known that scald development depends on the harvest date. Apples harvested too early are particularly prone to scald. However, even when harvesting fruit on the recommended date, it is not always possible to avoid scald. Thus, indicators should be worked out for pre dicting scald development that would show whether chemical treatment is needed during harvesting. Max imum treatment is often unnecessary, because scald susceptibility is extremely variable. For 20 years after the approval of antioxidant chemicals, little further attention was given to this problem. Currently, the interest is renewed due to the need to reduce the use of chemicals wherever possible. It has been previously demonstrated [3] that heat treatment of 38°C for 2 days slowed the development of scald in fruit stored for 3 months, although by 6 months of storage it reached the same levels as in control apples. Heating for 4 days was effective in preventing scald for the first 3 months of storage. However, after 6 months of stor age, scald incidence averaged 50%. It was also revealed that fruit harvested on other days and heated for 4 days were not fully protected from scald. Depending on har vest dates, this type of treatment is not effective in inhib
iting scald. Therefore, it can substitute for chemical treatment of scald for only shortterm fruit storage. The purpose of the present study was to work out new nonchemical control of scald during storage.
Currently, very few studies have investigated possi ble nonchemical control of scald during storage. It is known that scald development depends on the harvest date. Apples harvested too early are particularly prone to scald. However, even when harvesting fruit on the recommended date, it is not always possible to avoid scald. Thus, indicators should be worked out for pre dicting scald development that would show whether chemical treatment is needed during harvesting. Max imum treatment is often unnecessary, because scald susceptibility is extremely variable. For 20 years after the approval of antioxidant chemicals, little further attention was given to this problem. Currently, the interest is renewed due to the need to reduce the use of chemicals wherever possible. It has been previously demonstrated [3] that heat treatment of 38°C for 2 days slowed the development of scald in fruit stored for 3 months, although by 6 months of storage it reached the same levels as in control apples. Heating for 4 days was effective in preventing scald for the first 3 months of storage. However, after 6 months of stor age, scald incidence averaged 50%. It was also revealed that fruit harvested on other days and heated for 4 days were not fully protected from scald. Depending on har vest dates, this type of treatment is not effective in inhibiting scald. Therefore, it can substitute for chemical treatment of scald for only shortterm fruit storage. The purpose of the present study was to work out new nonchemical control of scald during storage.
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