In the management of grape planting, preventing flower and fruit falling, denuclearization, shoot control, and secondary results are all very complicated and time-consuming. In addition to strict implementation of standardized and standardized management, plant growth regulators play a vital role.

1. Control shoots

In addition to normal topping and sprouts, you can also control the shoots by using the growth retardation inhibitor melanine:

Mepiquat chloride(PIX): Use 500-750mg/L 2-3 days before flowering to when the flower is seen. Spraying the whole plant combined with supporting ction and management measures can inhibit the growth of grape branches and improve Kyoho The fruit setting rate of crs, Jingya, Hutai 8, Yinhong, etc., replaces the use of fruit preservation agents, reducing the risk of thickening and astringent peels.

Paclobutrazol and Chlormequat (CCC) are prone to fruit shrinkage, delayed maturity, and quality decline. The effect is unstable, so it is not recommended.

2. Pull flowers, preserve fruit

(1) Use period

The new shoots are 6-8 leaves, 25-30 cm long. The shoots are set and used immediately, generally 20-25 days after germination and about 20 days before flowering. The elongation of the inflorescence is related to the period of use. Use the early inflorescence to make it very long. It is not obvious to use late inflorescence, so adjust the concentration according to the period of use.

(2) Selection of garlａnd agent

Generally, gibberellin (GA3), S-ABA, and other agents can be used, and gibberellin is used more often. Dissolve and mix the medicament with water and evenly dip the inflorescence or spray the inflorescence to pull the flower. In order to save time and labor, the method of directly spraying fruit ears is often used in production. In order to enhance the use effect, chemicals can be added to the liquid to prevent gray mold and cob brown blight. The flower ears need to be arranged after the flower pull, because the ears are important to increase, the number of ears should be appropriately reduced to control the yield.

3. Improve storability

(1) Use potions: GA3 and 2,4-D, the postharvest treatment of the grapes with GA3 and 2,4-D can significantly improve the preservation effect. Mix GA3 into 3mg/L water-soluble, 2,4-D into 50mg/L water-soluble for soaking the fruit, soak all the ears in the liquid, keep it for 5 minutes, take it out and air-dry, and load 1 0.04mm poly for every 3 kg. In the vinyl film bag, the loose tie mouth is kept ventilated and placed flat on the storage rack. The fruit stress resistance and fruit stalk tension resistance have been greatly improved, and the fresh stalk rate and the good fruit rate have also been improved to varying degrees, and the storage effect is better.

(2) Use potions: Naphthalene acetic acid (NAA)+6-Benzylaminopurine (6-BA), soaking grape ears with NAA+6-BA can inhibit the production of S-ABA in the fruit, thereby inhibiting the formation of delamination at the stalk of the fruit, keeping the tissues around the stalk intact, and preventing germs from escaping from the stalk. Partial intrusion, delays falling particles. Taking Qinlong large grains as an example, when the grapes are fully enlarged, use NAA:6-BA=1:1 to soak the ears, which can greatly reduce the phenomenon of shattering before and after harvest and during storage.

Zhengzhou Delong Chemical Co., Ltd. is a plant growth regulator production base in China, established in 2009, specializing in the production of plant protection products. If you have any questions, please feel free to contact us any time.