Backfill question: at what temperature should apples be stored?
The safety of the crop is ensured by maintaining appropriate conditions in the place where the fruits are stored.
One of the important requirements is the storage temperature. If all conditions are met, apples are stored for a long time.
So, at what temperature should apples be stored at home in winter? Let's figure it out.
Content
Optimal temperature storage in winter at home
Like many other fruits, apples release ethylene during storage. This substance accelerates the ripening of fruits and affects the keeping quality of vegetables and fruits that are nearby.
In addition to maintaining the temperature indicators at the required level, humidity should also be kept within 85%.
| Variety | Temperature, С | CO2 concentration in chambers with RGS,%, V / V | O2 concentration in chambers with RGS,%, V / V | Possible storage duration, months |
| Bessemyanka Michurinskaya | 0-1 | 3-5 | 3 | 5-6 |
| Vernenskaya grushovka | 0-1 | 3-5 | 3 | 5-6 |
| Aport Alexander | 0-3 | 3-5 | 2-3 | 6-7 |
| Mac | 0-2 | 3-5 | 2-3 | 6-7 |
| Delicious, Red Delicious | 0-1 | 2-3 | 2-3 | 6-7 |
| Reneth Canadian | 3-4 | 3 | 3 | 6-7 |
| Steiman Vinesep | 0-1 | 2-5 | 2-3 | 6-8 |
| Granny Smith | 0-4 | 2-5 | 2-3 | 6-8 |
| Zailiyskoe | 0-4 | 5-7 | 14-16 | 7-8 |
| Zailiyskoe | 0-4 | 3-5 | 3 | 8-9 |
| Cinnamon new | 0 | 3-5 | 2-3 | 7-8 |
| Pepin saffron | 0 | 3-5 | 2-3 | 7-8 |
| Welsey | 2 | 5 | 3 | 7-8 |
| Jonathan and his clones | 3-4 | 5-8 | 13-16 | 7-8 |
| Jonathan and his clones | 3-4 | 3-6 | 2-3 | 7-8 |
| Mantuan | 0 | 3-6 | 3 | 7-8 |
| Reneth Burchardt | 0 | 5 | 3 | 7-8 |
| Reneth Orleans | 0 | 3-5 | 3 | 7-8 |
| Renet Simirenko | 2-3 | 3-5 | 3 | 7-8 |
| Stark, Starkrimson | 0-1 | 3-5 | 3 | 7-8 |
| Boyken | 0-1 | 3-5 | 3 | 7-8 |
| Banana winter | 0-1 | 3-5 | 3 | 7-8 |
| Renet Chernenko | 0 | 3-5 | 2-3 | 7-8 |
| Idared | 2-3 | 2-3 | 2-3 | 8-9 |
| Golden Delicious | 0-4 | 3-5 | 2-3 | 8-9 |
| Reneth Champagne | 0-1 | 3-5 | 3 | 8-9 |
| Zarya Alatau | 0 | 2-3 | 3 | 8-9 |
| North synap | 0 | 2-3 | 2-3 | 8-9 |
| Rosemary white | 0 | 3-5 | 2-3 | 8-9 |
Is it possible to increase the degree above normal?
If the temperature in the room with apples is higher than + 5 ° C, the fruit will begin to wither.
Designed for long-term storage fruits should preferably be placed in suitable conditions during the first days after harvest.
A delay for a couple of days for winter varieties is not critical, but if you stay warm for a long time, the crop will be spoiled very quickly: the fruits will begin to wither and lose their taste.
What are the minimum indicators the fruit can withstand?
Winter varieties of apples able to withstand temperatures down to -1 ° C at the storage location. At a lower level, freezing of fruits is possible.
Fruits acquire:
- vitreous pulp;
- general softening.
Such manifestations can be prevented by controlling the temperature, and preventing it from dropping below the necessary one. All varieties of apples that have been frozen can acquire a glassy state.
For some species, the optimal storage indicator is + 3 ° С - + 4 ° С... When such fruits are found in conditions of a critical temperature for them, even at 0 ° C, low-temperature decomposition can be observed, as a result of which:
- the skin turns brown;
- the flesh turns brown.
Cold (low-temperature) drilling of the pulp begins with damage first to the upper layer under the skin. Gradually, the process spreads to deeper layers.
The content of fruits at + 3 ° C will help prevent spoilage of apples. Demanding in this sense include:
- Jonathan;
- Cox Orange;
- Mekintosh;
- Canadian renti and some others.
The process of removing fruits from low-temperature refrigeration:
- Temperature rise in storage to 0 ° С.
- Increase to + 2 ° С.
- Standing for 7-14 days.
- Analysis of the condition of the fruits.
Are swings bad?
Any changes in the conditions of finding apples for fruits are extremely undesirable. The harvested crop is most strongly affected by temperature changes, especially sharp ones.
If fluctuations occur in the permissible storage range of +/- 1 ° C, then nothing threatens the crop... But with significant drops, the fruits will disappear, and will not lie down all winter.
Unpretentious varieties
For long-term storage, winter varieties should be selected that have a high lethargy. Different varieties react differently to low temperatures.
These frost-resistant varieties include:
- Pepin Saffron;
- Boyken and some others.
But for most, even winter apples, the flesh turns brown. Such manifestations are typical for the following varieties:
- Parmen Winter Gold;
- Antonovka Ordinary, etc.
Resistance to hypothermia during storage of the crop is associated with the structure of the pulp of the fruit itself and its viscosity.
Recommendations
Additional tips to help you better deal with storage problems apples:
Large fruits release more ethylene than small ones, which will cause the latter to deteriorate faster. Therefore, pre-sorting must take into account both the variety and size of the harvested fruit.- If the fruits are stacked in storage without preliminary sorting by varieties, then if the temperature regime is violated both upward and downward, the fruits must be sorted out.
- If the required temperature is maintained, but the humidity drops, the apples will start to deteriorate. Fruits with thin integumentary tissues (Pepin saffron, Boyken, Welsey and others) are especially sensitive to such changes.
- Periodic ventilation will help eliminate the excess ethylene that is released from stored fruit. But prolonged active ventilation can lead to the opposite effect - a loss of pulp density and presentation.
A lot of useful and important information about storing apples can be found here.
Conclusion
It is advisable to set the temperature regime for storing apples, taking into account the variety and growing conditions. If this condition is met and the humidity is kept high, the fruits placed in storage can remain fresh and juicy for many months.
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