1) What is Controlled Atmosphere (CA) storage?
In order to keep apples fresh as long as possible without losing its nutritional properties and appearance, it is essential to create special conditions for reducing the fruit respiration intensity. For this purpose, special controlled atmosphere storage facilities are created. Due to reduced concentration of oxygen, natural decomposition of fruit tissues slows down, which allows for preservation of the fruit flavours & characteristics.
2) What are the Recommended conditions for Apples CA storage?
a) Maintain the Co2 (Carbon Dioxide) level in the room upto 0.3%%
b) Maintain the O2 (Oxygen) level in the room upto 21%
c) Maintain the N (Nitrogen) level in the room upto 78%
3) List the precautions for apple CA storage?
a) Store only good quality apples
b) Cooling the storage room quickly
c) Filling the apple quickly
d) Maintain the indoor and outdoor unit
4) What is the best temperature andrelative humidity for storing apples respectively?
A temperatureranges of -1 to 0°C and a relative humidity of 90 to 95% are ideal for thestorage of apples. The fruit's storage life will be extended thanks to thisenvironment's ability to reduce the rate of respiration.
5) How is happen when NH3 leakage in Apple CA room?
If NH3 leaked in CA room will cause death of tissue in apple adjacent to the dots and likely to be infected with fungus diseases
6) What impact does the ethylene thatapples produce has on other commodities?
Ethylene gas, aripening chemical that quickens the ageing process in fruits and vegetables, isnaturally produced by apples. Other surrounding goods may be impacted by thisgas, ripening or spoiling more quickly. It is advisable to store apples apartfrom other fruits and vegetables to avoid this.
7) What factorsinfluence the storage life of apples?
The storage life of apples is influenced by the fruit's maturity whenpicked, delays before cold storage, storage temperature, and the presence ofother foods in the room. Other factors include the variety of apples, orchardculture and climate, fruit size, and pre-handling procedures.
8) List the storage period variation of different apples between CA storage and cold storage?
● Cortland: 4 to 6 months in case of CA storage; 2 to 3 months in case of cold storage
● Delicious: 8 to 12 months in case of CA storage; 3 months in case of cold storage
● Fuji: 8 to 10 months in case of CA storage; 4 months in case of cold storage
9) How to do during pre-treatment of Apple?
a) Packed in boxes or cartons
b) Fruit boxes covered with polyethylene film
10) How do we prepare apple before freezing?
a) Washing
b) Peeling
c) Coring
d) Slicing
11) What are the processes for inhibiting the browning reaction in Apple?
a) Salt brining
b) Sulfuring
c) Blanching
d) Sugar solution process
12) What is de-hydro freezing and list the advantages?
Apple slices are ones that have had water removed by controlled belt or rotary drying equipment.
Advantages:
a) More pieces to be stored in space
b) Less weight per unit apple
13) What signs of apple cold sensitivity arethere?
Interiorbrowning, water core (when the fruit's centre turns liquid), loss of firmness,and an increase in surface pitting are a few signs that apples are sensitive tocold temperatures. If the fruit was incorrectly acclimated to storageconditions or exposed to low temperatures for an extended period of time, thesesymptoms may manifest. To prevent bruising, apples should be handled carefully,and cold damage can be minimised by storing them at the proper temperature andrelative humidity.
14) What common diseases harm apples that have been kept in storage?
Apples thathave been stored are frequently afflicted by diseases like
- Alternaria Rot
- Bitter Rot
- Black Rot
- Blotch
- Blue Mold Rot
- Bull's Eye Rot
- Core Rot
- Fisheye Rot
Signs, causes, and therapies of each disease are unique.
