1. Cutting roots

IAA

Fast immersion method:

Prepare a high-concentration solution of l000mg/L and place it in the bottom basin. The depth of the liquid is 3~100px. Then, a small bundle of small bundles of cuttings is erected in the container. After immersing for 5 seconds, it can be taken out and dried to be inserted into the seedbed. . This method is easy to operate, has few equipments, and the same solution can be reused, with less dosage and faster speed.

Slow dipping method:

The indole acetic acid was formulated into a solution having a concentration of 25 mg/L (a variety susceptible to rooting) to 200 mg/L (a rooting type), and the base of the cuttings was immersed in the liquid for 8 to 12 hours, and then the cuttings were taken out. This method has a long dip time, and requires a large number of containers for large-volume insertion, and the dosage is large.

Powder method: IAA, dissolve it with an appropriate amount of 95% alcohol or 60 degree shochu, and then fully stick with 1000g talcum powder. After the alcohol is evaporated, it will be 1000mg/L phthalic acid powder. When cutting, firstly wet the base of the cuttings with water, then simmer in the prepared acetic acid powder, shake off excess powder and insert into the seedbed. Naphthaleneacetic acid Select an annual rod with excellent variety, strong growth, full buds and no disease, and immerse the base of the cuttings at 2～75px in 50～100mg/L of naphthaleneacetate for 8~12h, and then bury it in damp. Promoting roots in the sａnd can promote rooting, and inhibit the premature germination of cuttings, thus shortening the time difference between the sprouting and new roots and increasing the survival rate of cuttings.

Note that naphthaleneacetic acid can be mixed with indole acetic acid to increase the root-promoting effect. ABT rooting powder is soaked in a concentration of 50mg/L for 4-8 hours to promote rooting.

2. Inhibit the growth of new shoots

B9

The use of B9 can shorten the growth of the grape branches, deepen the leaf color, the leaves are small and thick, and the chlorophyll is increased. B9 control grape shoot growth is not as strong as chlormequat, and the inhibitory effect is also slower.

According to the test, the treatment of gerbera grape with butyric acid hydrazide 200mg/L is better, and for the grape of Jufeng and Kangke, it should be increased to 2000~3000mg/L. The time for spraying B9 is 7-10 days earlier than that of chlormequat, and the spraying concentration is 2000-3000 mg/L. The spraying concentration is determined according to the grape variety.

Note: When using B9, it is necessary to test the local varieties before they are promoted; Jufeng treated with butyric acid hydrazide 4000mg/L did not cause phytotoxicity. When 6 to 7 leaves of grape shoots are grown, spraying once with 1000 mg/L to 2000 mg/L of B9 can inhibit the growth of new shoots and increase yield. It can also be mixed with gibberellin to increase the proportion of non-nucleus, increase fruit firmness and reduce the breakage rate during transportation.

Phosphine

At the first month before the ripening of the berries, spraying the whole plant at a concentration of 500-1000 milligrams/kg can increase the sugar content of the fruit: controlling the growth of the secondary shoots. The physiological role of regulating phosphorus is obviously enhanced with the increase of application concentration, but the highest concentration should not exceed 1500 milligrams/kg to prevent phytotoxicity.

Chlormequat

In the early stage of the new shoots, before the flowering of the grapes, spraying with 100-500mg/L of the drug solution has obvious inhibitory effect on the growth of grape shoots. The general growth can be reduced by 1/3~2/3 compared with the control, and the growth of the secondary shoots. Also have some control. For varieties such as rose scent, white rose, and Riesling, it can be sprayed with 100-400 mg/L of chlormequat, and sprayed with 500-800 mg/L for Jufeng grapes.

Note that grape spraying chlormequat controls the shoot, the effect increases with the increase of concentration, but when the concentration is higher than 1000mg/L, the edge of the leaf will be chlorotic and yellow; when the concentration exceeds 3000mg/L, the long-term damage is not easy to recover. Therefore, the spraying of chlormequat should control the concentration of spraying; the control effect of the grape varieties on the use of chlormequat is inconsistent. Therefore, according to the local varieties and natural conditions, the appropriate concentration should be used to control the spurs. .

Paclobutrazol

Tu Shi:

Before the germination of Jufeng, 15% paclobutrazol 6~10g (purity of 0.9-1.5g) was applied to each grape, and the soil was evenly distributed in 375px deep soil layer after application. After 1 to 4 days of application, the internode length was not inhibited, and the internodes were significantly shorter after 4 knots. The annual shoot length was compared with the control: 6 g was 67% for control, 60% for 8g, and 52% for 10g.

Foliar spray:

Spraying paclobutrazone once a week for 1 week, the effective dose is 1000-2000mg/L, the annual growth of new shoots is only about 60~2000px, which is about 60% of the control, which is a moderate result. And the formation of spikes in the second year was 1.6 to 1.78 times of the control. Foliar application should be in the early stage of grape shoot growth (generally at the end of grape flowering), and the inhibition of new shoot growth is not obvious at night.

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