What are the latest methods for improving the quality of Kyoho grapes?

After Kyoho grapes were introduced to China in 1995, the quality of Kyoho grapes has been on a declining trend since 2003. Some fruit ripens poorly, some berries expand poorly, and some color poorly. Some vines even wither directly, and the berries rot and deteriorate, which severely reduces the quality of Kyoho grapes and has a major impact on their market competitiveness. Therefore, how to improve the quality of Kyoho grapes is now the primary goal. Today, the editor brings you methods for improving the quality of Kyoho grapes.

1. Fertilizer and water management

Kyoho grapes have very strong growth vigor and a high demand for fertilizer and water, so fertilizer and water management for Kyoho grapes must be strengthened. Experiments show that for every additional 100 of berries produced, Kyoho grapes require 1.5:1:1.5 kg of pure nitrogen, phosphorus, and potassium fertilizer. During the berry growth period, maintaining sufficient water can effectively expand the berries and increase yield, but water should not be excessive, because excessive water reduces the sugar content of the fruit, causes high acidity, poor coloring, fruit cracking, and other problems. It can also induce many diseases, such as gray mold, which greatly harms the aroma, color, and flavor of Kyoho grapes and seriously affects quality. Therefore, water should be applied in the right amount, and watering should stop half a month before harvest. Nitrogen fertilizer should also be controlled and not applied excessively, while potassium and phosphorus fertilizer should be increased to prevent excessive vine growth and avoid affecting air and light penetration.

2. Reasonable pruning

Many times, in order to increase yield, fruit growers do not thin flower clusters or pinch flower spikes in summer, resulting in insufficient and scattered nutrient supply, uneven fruit ripening times, and uneven fruit size. In winter, light pruning and long cane leaving, with too many canes retained, causes the fruiting position to move upward, excessive load, and uneven distribution, leading to nutrient imbalance and a great impact on the formation of high-quality fruit. Therefore, for Kyoho grapes, the main shoot should be pinched before flowering, secondary shoots should be removed, and nutrients should be directed to the flower organs. Some flower clusters should also be appropriately thinned. About four days before flowering, about one quarter of the tip should be pinched off so that nutrients are concentrated in the berries.

3. Disease control

Disease is the main reason harming the quality of Kyoho grapes. After harvest in winter, the orchard should be thoroughly cleaned, plowed, and disinfected, and diseased and disabled branches should be handled. Before grape buds break in spring, spray Baume degree lime sulfur mixture to control powdery mildew and felt disease. After flowering, spray an equal amount of Bordeaux mixture to control black pox. If damage from the grape clearwing moth is found on the fruit, dichlorvos can be poured into the bore holes, and then the insect holes should be sealed with clay. To prevent the fruit from being contaminated by pesticides, spraying should stop 15 days before picking.

4. Timely harvesting

The growth period of Kyoho grapes is about April to May. Under correct cultivation techniques and management methods, they generally begin to color in July and mature in late August. In late August, when the grape berries turn purple, the sugar content exceeds 15%, and the aroma is relatively strong, that is the most suitable time for harvesting. During harvest, it should be done after the morning dew has dried or in the afternoon. It is not suitable to harvest on cloudy or foggy days. Try to reduce humidity and heat damage during harvest. Prevent disease during storage.

The above are methods for improving the quality of Kyoho grapes. Everyone must pay special attention to fertilizer and water management and disease, because these two aspects have the greatest impact on Kyoho grapes. A small mistake can cause a large reduction in grape yield or even total crop failure. This has a huge impact on farmers' economic interests and may result in losing everything. Therefore, everyone must have a correct management method to protect grape growth. If you want to learn more related information, please continue to follow Qinnong Network!