Hello fellow farmers, many times grape growers face low temperatures during the flowering period, low temperatures can lead to the problem of bead cracking. At minimum temperature i.e. below 15 degrees Celsius, grapevine roots stop working, leaves stop or reduce photosynthesis, carbon dioxide from the air stays in the soil due to low temperature and (at temperatures below 15 degrees Celsius, the weight of carbon dioxide increases more than other air and it does not reach the leaves at night) Photosynthesis stops, as a result, the production of new food from the leaves of grape vines stops. While moving to the roots, during this process the food (carbohydrates) produced by the leaves is temporarily stored in the trunk and sent back to the panicles for food storage. But at very low temperature (below 15) the absorption of carbohydrates from the leaves slows down, which means that the swelling and energy production of the stems and seeds slows down. Not only water but also many types of nutrients (minerals) are required for the development of the pods and swelling of the beads and various hormones help to manage these nutrients. However, this chain breaks down at low temperature and the shell on the bead closes with growth and only water accumulates inside the bead as a result of which such beads break and this is called cracking. In some vineyards, excess nutrients are stored in trunks and leaves, which is called storage or reserve food reserves. Grape vines with such storage are not immediately affected by low temperatures. In this situation, the vineyards have to be protected from the cold, even if the temperature is very low, i.e. 7-8 degrees Celsius, the garden should be lit at night, so that a warm atmosphere will be created in the garden. - If 60 days old then spray 12:61:00 two grams + SV Ketone 1/2 ml, 1 time magnesium sulfate 3 gm + SV ketone 1/2 ml when the beads are at water removal stage, and 1 time Chelated Mix Micro Nutrient 1 Gram + SV Ketone should be sprayed with 1/2 ml, preferably water the garden early in the morning, if the temperature is lower than daily, one liter of SV Ketone + one liter of SV Caffeze should be left in the vineyard by drip so that the bunches will immediately become soft and flexible and usually there will be no cracking. However, this preparation has to be planned strictly from the April pruning so that the grape vine is saturated with plenty of storage before the October pruning.
author-
Mr. Subhash Chandra Karale Sir
Director, SV Agro Solutions