Causes and Control measures of Grape Fruit shrinkage

Grape is a fruit that we often eat every day, which is sour, sweet and delicious, with high nutritional value, and is deeply loved by consumers, but fruit shrinkage is a headache in the process of grape planting, which seriously affects the normal growth of grapes, reduces yield and quality, and brings economic losses to fruit growers. So what is the cause of grape shrinkage? How to prevent and cure it? Let's get to know it.

1. Symptom manifestation

At first, small light brown spots are formed in the pulp, and then gradually expand. In severe cases, the pericarp becomes black, and light brown or dark red or dark gray patches appear in the affected area, and the disease part will be sunken. When the peel of the diseased part is opened, the local pulp will appear as if it was crushed. After the fruit is ripe, the pulp of the diseased piece will be as hard as before.

2. Reasons

Fruit shrinkage disease generally occurs under high temperature, mainly due to lack of water, imbalance of hormones such as ethylene and lack of trace elements such as boron and calcium. When the soil moisture is high for a long time, the opening and closing function of the stomata of the leaves is passivated, and if the air temperature continues to rise, the leaf evaporates too much water, and it is unable to absorb enough water from the root system, the phenomenon that the leaf will increase and grab water from the fruit will occur, thus causing fruit shrinkage disease.

3. prevention and control measures

The middle ploughing can improve the air permeability of the soil, ensure the water balance between the ground and the lower, ensure the vitality of the root system during the whole growth period, dig deep ditches in the orchard and drain in time to ensure the water balance between the upper and lower parts of the ground. The application of organic fertilizer can thoroughly improve the physical properties of soil, increase the content of soil organic matter, make it have better water permeability, water retention and ventilation, and increase sufficient nutrients for plant growth and fruit development. at the same time, it is necessary to control the application of nitrogen fertilizer, resulting in excessive growth of branches and leaves in a year, competing for water and fertilizer with fruit growth. The damaged fruit can be removed in time to avoid ineffective nutrition consumption. Boron and calcium fertilizer can be applied through foliar fertilizer. It is suggested that it should be applied once before flowering and sprayed continuously for 2-3 times during the young fruit expansion period, so as to increase the nutrition supply, enhance the tree potential and improve the disease resistance.

The above is the introduction of the causes and control measures of grape shrinkage. I hope it can help you. If you want to know more about it, please follow us.