1. Rooting cuttings

(1) Indole acetic acid (IAA), indole butyric acid (IBA)

Quick soaking method: prepare 1000mg/L high-concentration solution and put it in the bottom basin with a depth of 3～100px, then put a small bundle of cuttings upright in the container, soak for 5 seconds and then take it out to dry. Cuttings in the seedbed. This method is easy to operate, less equipment, the same solution can be used repeatedly, less dosage and fast speed.

Slow soaking method: Indole acetic acid is formulated into a solution with a concentration of 25mg/L (variety that is easy to root) ~ 200mg/L (variety that is not easy to root), and then the base of the cuttings is immersed in the liquid for 8-12 hours and then the cuttings are taken out. This method has a long dipping time, a large number of cutting points require more containers and a large amount of medicine.

Dip powder method: Take 1g indole acetic acid, dissolve it with 95% alcohol or 60-degree shochu, and then fully mix with 1000g talcum powder. After the alcohol evaporates, it will become 1000mg/L indole acetic acid powder. When cutting the cuttings, first soak the base of the cuttings with water, then dip them in the prepared indole acetic acid powder, shake off the excess powder, and insert them into the seedbed.

(2) Naphthalene acetic acid (NAA)

Choose the annual sticks with good varieties, strong growth, full buds and no pests, and immerse the 2～75px of the base of the cuttings in 50～100mg/L naphthaleneacetic acid solution for 8～12h, and then bury them in moist sａnd Promoting roots can promote rooting and inhibit the premature germination of cutting buds, thereby shortening the time difference between cutting buds and new roots, and increasing the survival rate of cuttings.

Note that naphthalene acetic acid can be used in combination with indole acetic acid to improve the root promoting effect.

2. Inhibit the growth of new shoots

(1) Chlormequat (CCC)

At the early stage of the growth of new shoots, before the grapes bloom, spray with 100-500mg/L liquid, which has a significant inhibitory effect on the growth of new shoots of grapes. Generally, the growth can be reduced by 1/3 to 2/3 compared with the control, and the auxiliary shoots grow at the same time. Also some control. It can be sprayed with 100-400mg/L of chlormequat on rose, small white rose, Riesling, and 500-800mg/L on Kyoho grape.

Note that the effect of spraying chlormequat on the shoots of grapes increases as the concentration increases, but when the concentration is higher than 1000mg/L, the edge of the leaves will be chlorotic and yellow; when the concentration exceeds 3000mg/L, the long-term damage will not be easy to recover. Therefore, the spraying concentration of chlormequat should be controlled for grapes; the control effect of using chlormequat is inconsistent among grape varieties. Therefore, it is necessary to use chlormequat to control shoots according to local varieties and natural conditions and master the appropriate concentration.

(2) Paclobutrazol

Soil application: Apply 15% paclobutrazol 6-10g (0.9-1.5g for pure product) to each grape before germination of Kyoho, and harrow the soil after application to make the medicine evenly distributed in the 375px deep soil layer. After 1 to 4 nodes, the length of the internodes was not inhibited. After 4 nodes, the internode lengths were significantly shorter. Compared with the control, the length of new shoots throughout the year was 67% for 6g, 60% for 8g, and 52% for 10g.

Foliar spraying: spray paclobutrazol once one week after flowering, 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, it is a moderate, robust and fruiting branch . And the formation of flower spikes in the second year was 1.6 to 1.78 times that of the control. Foliar spraying should be in the early stage of the growth of the new shoots of the grapes (usually at the end of the grape flowering period). Too late has no obvious inhibitory effect on the growth of the new shoots.

3. Increase the fruit setting rate and preserve flowers and fruits

(1) Diethyl aminoethyl hexanoate (DA-6)

Spray 1 to 2 times with 10-15mg/L liquid medicine during the initial flowering period to increase the fruit setting rate.

PCPA with a concentration of p-chlorophenoxyacetic acid (PCPA) of 50 mg/L is treated once in the citrus blooming period and young fruit period, which has a significant effect on fruit preservation.

(2) S-ABA

At the initial flowering stage and after the flower of Kyoho grapes, 15 mg/L of anti-falling element was sprayed twice, which had a significant increase in yield and improved fruit quality; 10 mg/L of anti-falling element had the best effect on Muscat grapes , The fruit setting rate increased by 13.4%, the yield per plant increased by 21.49%, the ear color index was 86.3%, the ear regularity was 92.56%, and the sugar-acid ratio was 16.7. If it can be sprayed with potassium dihydrogen phosphate, the effect will be even more impressive.

(3) Brassinolide

6 days after the grapes bloom, the ears can be impregnated with 0.01mg/L brassinolide-481 solution to increase the fruit setting rate.

(4) Cytokinins

From the first flower to the full bloom period, the concentration used in greenhouse ction is 5mg/L-10mg/L, and the concentration used in open field ction is 2mg/L-5mg/L. Flower spike treatment can prevent falling flowers. The gibberellin treatment during the production process will continue as usual.

(5) Chlormequat

When the new shoot grows 15～1000px, spraying 500mg/L of chlormequat can promote the differentiation of winter buds on the main vine; spray 300mg/L of chlormequat 2 weeks before flowering or spray 1000 during the rapid growth period of the accessory shoots ~2000mg/L of Chlormequat can promote the differentiation of buds on accessory shoots into flower buds.

However, after the application of chlormequat in grapes, the inflorescence axis is often shortened, the ears are tight, and the fruit kernels squeeze each other, which affects ventilation and light, and is easy to get disease. If combined with a low concentration of gibberellin, the inflorescence axis can be properly elongated.

Zhengzhou Delong Chemical CO., Ltd. is the production base of plant growth regulators in China, which established in 2009, specializing in offering plant protection products. If you have any question, contact us any time.