Sometimes a reduction or complete absence of crop loss is caused by the kidneys, vines and branches during the overwintering buds bloomed or damaging late spring frosts.

Cold hardiness of grapes , ie, the ability to withstand temperatures below 0 °, varies and depends on the type, degree of preparation for overwintering, intensity and duration of frost.

The various organs of the vine plants tolerate temperatures below zero is not the same: start at 0 ° damaged inflorescence at -1 ° – young shoots and leaves , and -3-4 ° – swollen buds at -5-7 ° – roots at -18 ° – eyes, at -22 ° – vine at -26 ° – old wood. Vine ripened less damaged by low temperatures.

Cold-resistant varieties of grapes

The most cold-resistant varieties Rkatsiteli, Cabernet Sauvignon, Riesling, Aligote, Feteasca, Senso, etc. High Karaburnu frost have Amur grape Riparia and labruska.

In the Chu valley greatest loss of wintering buds of grapevine observed in years with relatively cold winters, but with frequent and sudden changes of heat and cold. At the same time one of the main reasons for the low frost holes in the shelter is a violation of the depth of their premature peace.

Protecting grapes from frost and freezing

When growing grapes should take measures to prevent it from adverse environmental conditions and to prevent crop losses. Frosts are particularly dangerous for the vineyard, as detrimental not only to the year of damage, but the impact in subsequent years. The main activity of the protection of vineyards from frost is to cover the bushes for the winter. The material for the cover can be used reed mats, straw, reeds, paper, burlap, roofing felt, sometimes harbor and land. However, best results are given shelter plant materials. It reduces the harmful effects of temperature fluctuations, resulting in his eyes during the winter season is much better preserved and productivity increases. In addition, plants, plant-hoarding for winter tires, less iznezheny and more resistant to spring frosts after they opened.

In northern Kyrgyzstan, spring frosts are in late April and early May, and even up to -4-6 °, resulting in the death of buds, and consequently the crop.

The most common measure against frost

Namely – Smoke by burning smoke grenades, smoke heaps of old tires, etc. culled for heaps harvested material that gives a lot of smoke: rotted leaves, peat, grass, The straw manure . When the temperature drops below 1 ° of heat piles are lit, pre-poured oil or fuel oil. A large number of thick, heavy, well-trailing smoke give the burning tires. Smoke stop after 2-3 hours after sunrise. Ignite only heap on the leeward side. Smoke is beneficial only when the ignition is timely and piles on adjacent farmlands , as well as a small decrease in temperature (up to -2-3 °.)

How else can we save the grapes from frost Positive results in the fight against frost give copious irrigation , sprinkler irrigation, spraying , use of aerosol systems. The water, giving heat increases the air temperature at 1-2 °. In addition, the water evaporates and creates a moist air curtain (fog), which prevents the cooling of grape plants.

In case of prolonged and severe cold spells is the most effective temporary shelter of bushes with mats, straw, rags and other materials.

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