Causes of grape size and its control

The grape tastes sour and sweet, and it is the fruit that many people like. However, grape size often occurs when planting grapes, and grape size is a common situation in all planting areas of our country. Grapes often have inconsistent growth in size, some large and some small, after fruit setting. There are many reasons for this situation, which should be dealt with according to the situation of grapes and orchards.

1. Variety reasons

The reason for the production of grape grains may be due to the selection of varieties that naturally produce grains. For example, Victoria and Victoria are born with poor pollination and fertilization due to their own genetic reasons. poor pollination will naturally lead to the size of grapes, and small grapes generally have no seeds or very few seeds. In this case, the variety can be avoided when selecting the variety, or the variety can be treated with a seedless treatment, and all the seeds will not be expanded after they have no seeds.

2. Boron deficiency and zinc deficiency

The lack of boron during the growth of grapes will make it difficult for pollen to pollinate, resulting in the inability of ovules to be fertilized, and the number of fruit setting will be reduced as seeds cannot be formed in some fruits. If zinc deficiency, it will lead to insufficient auxin in the grape body, reduce fruit setting, and make it difficult to fall off the flower cap, resulting in large and small grains. If boron and zinc deficiency occurs in the orchard, it should be replenished immediately according to the specific situation, and boron and zinc fertilizer should be added.

3. Bad weather

In the grape flowering period, if you encounter continuous high temperature or cloudy and rainy weather, it will lead to difficulties in pollination, poor fertilization, difficult to set fruit, the formation of large and small grains. If an "H" ear is found in the garden, it is probably due to the size of the grain caused by the weather. Many friends in the north, afraid of poor grape yield, do not water the grapes in the early stage of flowering, but if they encounter high temperature, they will make the grapes fall. When encountered with low temperature and rainy conditions, the grapes should be covered with a film, the film should be equipped with lighting equipment, give the grapes enough temperature and light, and timely drainage. If you encounter continuous hot and dry weather, you should irrigate the grapes with enough water during flowering. Guarantee the need for water.

4. Hormone problem

There are several stages of grape growth that require the use of hormones, and improper use of hormones at these stages will lead to grape dysplasia. For example, gibberellic acid needs to be applied during inflorescence elongation in the first period, but if it is not applied in time, it will affect pollination and make the fruit generally small. The second is in the flowering period, when many friends will use fruit-setting medicine to promote fruit-setting, but improper use will lead to poor pollination, the fruit can not expand normally. The third is that the fruit growers use the swelling agent too early when they thank the flowers, and the seeds fail to expand. Be sure to use all kinds of hormones reasonably at all stages. If you don't know how to master hormones correctly, you should use little or no hormones.

These four kinds are the most common reasons for grape size, of course, there are many reasons, such as growth, density, etc., the editor did not say all of them, of which the most important thing is the use of boron and zinc fertilizers and hormones. Whether lack or excess will seriously affect the normal growth and development of grapes, so we must pay attention to use!