The cause of the latest size of Jufeng grape and its solution

Many grape growers often have the phenomenon of large and small grains in production, especially Jufeng grape, which seriously affects the yield and quality and brings great economic losses to the growers. So what is the reason for the formation of the size of Jufeng grape? How to solve the problem? Let's take a look.

First, the reason for the size of the grain

There are many reasons for the emergence of large and small grains of Jufeng grape, the fundamental reason is that the flowering period is poor pollination, large seeds are fertilized, there are seeds, while small grains are not fertilized, there are no seeds. There are many reasons for its poor fertilization, one is the variety, some varieties are very prone to the phenomenon of large and small grains, such as Jufeng Jingya, etc.; second, the tree potential is too prosperous, if the growth of Jufeng grape is too prosperous, and the new shoots are too thick and too long, the phenomenon of large and small grains will be more serious; third, due to climatic reasons, poor fertilization can be caused by overcast and rainy weather during the flowering period of grapes, resulting in the phenomenon of large and small grains. Fourth, improper artificial management, spraying pesticides in the grape flowering stage, will also cause poor fertilization, the formation of large and small grains; fifth, the tree potential is weak, lack of nutrition in the young fruit expansion led to the fruit can not expand in time, the formation of large and small grains.

II. Solutions

1. Control the tree potential

When the new shoots are overgrowing, it is necessary to control fertilizer and water, especially pay attention to the application rate of nitrogen fertilizer. For the overgrowing new shoots, the coring measures can be carried out most angrily to cultivate the secondary shoots into fruiting branches. If the tree is weak, it is necessary to strengthen fertilizer and water management, promote tree strength, and take measures such as coring and ear thinning to control the number of fruit and reduce the nutritional burden of the plant.

2. Reasonable spraying

Spraying is strictly prohibited in the grape flowering period, and the spraying time can be changed to before or after flowering. At this time, spraying will not affect the pollination of grapes, and it can also be fertilized or sprayed with boron fertilizer at flowering stage, which can significantly improve the fertilization rate and fruit setting rate. It can also be sprayed with zinc sulfate solution, which can also prevent the phenomenon of large and small particles.

3. Rational fertilization

It is necessary to control the balance of nitrogen, phosphorus and potassium fertilizer when fertilizing, and it is not suitable to apply a certain kind of fertilizer. Generally, the base fertilizer is applied once before sprouting in spring, mainly organic fertilizer, reasonably mixed with diammonium phosphate and potassium sulfate. The ratio of nitrogen, phosphorus and potassium should be controlled to 2:1:1 in the young fruit stage and 1:2:2 in the color conversion stage.

4. Use growth regulators

When the young fruit grows to the size of bean grain after half a month of Xiehua, the ear can be soaked or sprayed with 20mg/kg chloropyramide, which can obviously eliminate the grain size of grape. Gibberellin and flowering or post-anthesis treatment can also achieve the effect of eliminating grain size.

The above is the introduction of the reasons and solutions for the size of Jufeng grape. I hope it can help you. If you want to know more about it, please follow us.