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The chilling requirement of a fruit is the minimum period of cold weather after which a fruit-bearing tree will blossom productively. It is often expressed in chill hours, which can be calculated in different ways, all of which essentially involve adding up the total amount of time in a winter spent at certain temperatures.
The peach (Prunus persica) ... Most cultivars require 600 to 1,000 hours of chilling at temperatures between 4 to 10 °C (40 to 50 °F). During the chilling period ...
Without adequate peach chill, peach trees won't produce, and with rising temperatures, blooms will sprout too early. In 2017, around 70% of peach losses could be attributed to lack of peach chill.
The worst peach crop in 30 years has farmers, ... Dickey along with other Middle Georgia peach farmers sustained a substantail loss in the years crop due to lack of chill hours and a late freeze.
The BBCH-scale (stone) identifies the phenological development stages of stone fruit (cherry = Prunus cerasus, plum = Prunus domestica ssp. domestica, peach = Prunus persica, apricot = Prunus armeniaca). It is a plant species specific version of the BBCH-scale.
Frostbite is dangerous and can often happen quickly, depending on both the temperature and wind chill factor. Here’s how to know if it’s frostbite and how to treat it. Frostbite can strike ...
After Lysenko the term was used to explain the ability of flowering in some plants after a period of chilling due to physiological changes and external factors. The formal definition was given in 1960 by a French botanist P. Chouard, as "the acquisition or acceleration of the ability to flower by a chilling treatment." [7]
Plant growth has been observed to be correlated to the number of degree days. Many plants will fruit after a certain number of degree days. Common examples are strawberries and raspberries. In contrast, deterministic plants will fruit based on the time of year, which the plant determines from the number of consecutive hours of dark. Examples of ...