Plant Growth Regulators used on grapes（二）

4. Improve stress resistance and enhance plant growth

(1) 1.8% sodium nitrophenolate

Spray 5000-6000 times the solution after the new buds emerge, and spray 2 to 3 times from 20 days before flowering to before flowering, and spray 1 to 2 times after the result. It can promote fruiting and fruit hypertrophy, continuous use can effectively strengthen and restore tree vigor, inhibit decline, and have a good promoting effect on product quality and taste.

(2) Diethyl aminoethyl hexanoate (DA-6)

Spray 1 to 2 times with 10-15mg/L medicinal solution during fruit swelling period, which can make the fruit grow faster, have uniform size, increase sugar content, and improve stress resistance.

5. Expａnd fruit, improve quality and increase yield

(1) Gibberellin (GA3)

Treatment with gibberellin after anthesis increases the growth hormone in the fruit granule cells, which promotes the elongation and swelling of the cells, and at the same time mobilizes the transportation and accumulation of organic nutrients to the fruit grains, and rapidly increases the content of the pulp cells, thereby increasing the size of the fruit grains1 ~ 2 times, thus significantly increasing the value of the commodity.

Although it is used alone to enlarge the fruit grains, it also has the negative effect of making the fruit stems brittle and easy to fall. You can add BA (6-carylpurine) and streptomycin to prevent it. Depending on the variety and method of use, it needs to be determined by experiment. When gibberellin is used to increase the size of fruit, it must be combined with good agricultural technology to obtain the desired effect.

(2) Triacontanol

Farm used 0.5mg/L triacontanol per mu and 150g potassium dihydrogen phosphate to spray grapes with a yield of 613kg per mu, an increase of 101%.

(3) Mepiamine

It can increase the absorption of calcium ions, prevent the fruit shrinkage disease brown pandemic, and can reduce or reduce the fruit core, increase the amount of pulp, and improve the quality of the fruit.

(4) Cytokinin + Gibberellin

After 10 days and 20 days after the Kyoho grape blooms, the ears are sprayed with Daguole, which is a mixture of cytokinin and gibberellin, once, which can make the seedless fruit develop into the same size as the stone fruit, and the fruit can increase up to 50%.

(5) Mepiquat chloride (PIX)

Spraying 500～800mg/L liquid medicine in the vine flowering period or the young fruit swelling period can promote the formation and differentiation of flower buds, increase the fruit setting rate, increase the sugar content and vitamin C content, and the fruit particles are large and neat, and mature earlier 3～4d, increase yield and quality.

(6) Abscisic acid (ABA)

When the fruit begins to mature, spraying with 100-200mg/L abscisic acid can promote the coloring and maturity of the red varieties of Hongmi, Pioneer and Jingchuan, and also improve the sweetness of the fruit.

KT-30 seeded varieties: dip the ears with 20 mg/kg Pirolone liquid for 5 to 10 seconds 10-15 days after flowering, which can promote cell division, prevent flower and fruit drop, and can effectively promote grape fruit The increase. Seedless varieties: can be mixed with gibberellin for better effect, that is, 15 mg/kg KT-30 and 100 mg/kg gibberellin are mixed uniformly, and then dipped into grape ears at the end of flowering and 15 days after flowering. It can promote cell division, prevent flower and fruit drop, and can effectively promote the growth of grapes. It should be noted that the use concentration of KT-30 should not exceed 20 mg/kg, and the fruit processing time should not be too early, otherwise the phenomenon of large and small grains is easy to form.

6. Early maturity

(1) Ethephon

It is a fruit ripening agent. It is a common medicine for early coloring. The concentration and time of use vary with varieties. Generally, 100～500mg/L should be used at the beginning of berry ripening. For colored varieties, 5%～15% of the fruit particles will start to color , May mature 5-12d in advance. Experiments show that when the fruits of Kyoho varieties begin to mature, the ears can be sprayed and dipped with 250-300 mg/L of ethephon, which can mature 6-8 days earlier. However, the use of ethephon can cause a delamination between the grains and the stalks and drop the grains. Therefore, it is necessary to master the concentration, spray, harvest, and sell in stages to prevent losses.

The optimum concentration for ripening of different grape varieties is different, and the production has to be tested to determine the optimum treatment concentration and method.

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.