During the grape growing process, many growers will find that the ears of the grapes are too tight, which may lead to uneven coloring, the deformation of the fruit pieces, the fruit cracking and other symptoms, affecting the appearance of the grapes. Therefore, it is necessary to carry out the treatment of the spike before flowering.

First, the role of the ear

Reduce the work of thinning flowers and thinning in the later period, save labor; reduce the tightness of the ear, which is conducive to the increase of fruit in the later stage; can enhance the influence of light intensity on the flower, can “borrow the fruit by fruit”; increase the gap between the spikes, which is beneficial to reduce Pests and diseases.

Second, the period of use of grapes

The degree of elongation of the inflorescence is related to the period of use, and the use of the early inflorescence is long and the elongation of the late inflorescence is not obvious. Generally, the new shoots grow to 25-750px long (6-7 leaves), the inflorescences are 7-10 cm, that is, 20-25 days after germination, and it is appropriate to pull the ears about 20 days before flowering.

Third, which grape varieties need to pull the ear?

Large fruit type varieties: red earth, beauty finger, etc.; tight ear type: red, etc.; high fruit setting rate, small inflorescence varieties: summer black and so on.

Fourth, the method of pulling

At present, the method of pulling the ear is mainly the management of fertilizer and water and the pulling of the medicament.

The main feature of the management of the ear is relatively safe, but the speed is slow, the effect is not significant, and the external conditions, especially the temperature, are relatively large. Fertilization time is usually selected about 15 days before flowering, and it is applied with urea + bio-soluble fertilizer containing bio-stimulating hormone such as sea elf bio-stimulant. The problem is that it requires certain practical experience. There is a certain risk in the use of nitrogen fertilizer before flowering, and the method of pulling the ear will vary with each region, geography, temperature, light, humidity, and tree potential. The average daily temperature is required to be 20~25°C.

The main feature of the drug pull is that it is effective, relatively safe, and less affected by the environment.

5. Lama period

Grape ears are present at the same time as the leaves. As long as the ears are removed from the leaves, they can be treated until they are stopped 10 days before flowering. During this period, the earlier the medication, the more sensitive the grapes are to the agent.

Six, commonly used drugs

Commonly used pharmaceutics mainly include gibberellin, bismuth, and agonist. Among them, Qibao is used more, and the dosage is 1g Qibao water 25~40kg. The method of use is inflorescence dipping or micro-spraying inflorescence, in which the inflorescence is soaked.

Seven, matters needing attention and management

1. Rational use of pharmaceuticals. Pay attention to grape varieties, tree potential, tree age, etc., and pay attention to the weather conditions, temperature, humidity, light, etc. will affect, the concentration is as low as possible at high temperature, the concentration is higher at low temperature, the concentration of tree is strong, the tree is weak The concentration is lower.

2, prevent disease. After the inflorescence is elongated, the distance between the branches in the ear is widened. If the gray mold, the cob brown blight are harmful, the ear will have a gap, which will affect the quality and sales of the product.

3. Do a good job in fruit preservation. Individual varieties must be preserved if they are elongated.

4, whole ears, thin fruit. When the inflorescence is elongated, several spikelets of the shoulder are also elongated. After the fruit is placed, the long spikelets are cut off to remove some fruit, so that the ear is formed into a conical or cylindrical shape; The tip of the ear should be removed before the flower.

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