The latest course on the techniques and methods of grape flower drawing

After fruit preservation treatment, some grapes have a large amount of fruit, which will often lead to difficulties in fruit thinning in the later stage, and the mutual extrusion between fruit grains will lead to symptoms such as fruit cracking and rotten fruit, which will seriously affect the quality, so the drug will be treated before flowering. So how to carry out grape flower drawing? Let's get to know it.

1. Flower drawing

Flower drawing is panicle pulling, which can reduce the work of thinning flowers and fruits in the later stage and save a lot of labor costs. after flowering, it can reduce the tightness of the ear, help to increase the size of the fruit, improve the fruit quality, and avoid the occurrence of fruit cracking and fruit rot. It can also increase the effect of light intensity on flowers and increase the fruit setting rate. In addition, there is a large gap in the panicle after flowering, which is beneficial to reduce the prevention and control of diseases and insect pests.

2. Time spent

The degree of inflorescence elongation is related to the flowering time. Early flowering time will make the flower spike too long, and the effect is not obvious when the flowering time is too late, generally at the 6-7 leaf stage of the new shoot and when the inflorescence grows to 7-10 cm, that is, 20-25 days after budding. About 20 days before flowering. Although flower drawing has many benefits, it is not suitable for all grape varieties. Some varieties regret the phenomenon of large and small grains and stiff fruits, but increase fruit thinning work. The varieties that are generally suitable for pulling flowers are red earth, beauty finger, red lift, and summer black, while the varieties that are not suitable for pulling flowers have Jufeng.

3. The method of flower drawing

At present, there are mainly fertilizer and water management and chemical flower drawing for two weeks. Fertilizer and water management is relatively safe, but the speed is slow, the effect is not obvious, and it will be greatly affected by temperature. Generally, about 15 days before flowering, urea, humic acid, amino acid and other water-soluble fertilizers are applied, this method requires a period of practical experience, the application of nitrogen fertilizer before flowering has certain risks, and the environment of different regions is different. The use of fertilizer and water to manage flower pulling requires a daily average temperature of about 20-25 degrees. The effect of flower drawing is fast and relatively safe, and it can be treated when the ear is removed from the leaves until 10 days before flowering. The commonly used agents are gibberellin, green protection, elicitor and so on, of which gibberellin is more used.

4. Points for attention

When using chemicals to pull flowers, we should pay attention to such factors as grape variety, tree potential, tree age and climate. The concentration is lower at high temperature, higher at low temperature, higher in tree strength and lower in tree strength. After drawing flowers to prevent post-disease, so as not to affect the quality and sales, individual varieties should also do a good job of fruit protection.

The above is the introduction of grape flower technology, hope to help you, want to know more related knowledge, please follow us.