Frost is one of the annual problems of orchards, which can cause a lot of financial losses for farmers and gardeners and push their efforts to the point of destruction.
Definition of frostbite:
Frostbite is a physical or physiological change caused by exposure to various plant parts at temperatures below and above the freezing point (between 0 and 10 ° C) that is associated with the onset of symptoms. This feature is synonymous with keywords. Damage Chilling and Injury Chilling are used
Definition of frost:
Damages caused by temperatures below zero degrees Celsius are called freezing. Freezing injuries are mainly caused by the formation of ice crystals in the vessels of the plant that spread rapidly to all organs.
Types of frostbite:
Frostbite can be divided into several types, which are:
Transitional (frontal or cyclonic):
This type of frostbite is caused by the invasion of a cold and polar current and its passage through an area.
It causes a sharp and sudden decrease in the ambient temperature to several degrees below zero, the time of this flow:
- It occurs mostly during the recession of fruit trees (winter).
Radiation:
Cold and frost that occurs in a certain area without the penetration of cold air from other areas due to radiation from the ground in the same place, this type of frost always appears on quiet nights without clouds and wind.
Sorted by time:
Late spring:
Spring frosts are much more dangerous than early autumn frosts. This type of frostbite is more likely to occur in temperate regions, causing damage to flowers and fruits due to the more sensitive flowers and young fruits. Relative to ripe fruits.
- This type of frostbite can occur when the flowers open
- Its duration is not short, from a few hours to a maximum of three days.
Sensitivity to late spring cold are:
- Small fruit * Fully opened flowers * Semi-open flowers * Unopened buds
How late spring is estimated:
Small flowers and fruits are examined, and if they are green, it can be concluded that the flower or fruit is not damaged.
Winter frostbite:
Winter frosts occur in winter at temperatures as low as -10 ° C and below, and in the most severe cases, trees freeze. This type of frostbite on evergreen fruits such as citrus fruits and olives can cause a lot of damage.
Final note:
In today’s article, we tried to get more familiar with the concept of frostbite and its different types. In future articles, we will explain different solutions to deal with this problem. Stay with us
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