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Application of plant growth regulators on fruits plantation-Grapes

Date: 2023-01-26 16:23:58
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Application of plant growth regulators on fruits plantation-Grapes

1)Root grow

Use Root king
  Function Dosage Usage
Baby tree Take root, improve survival rate 500-700 Times Soak the seedlings
  Function Dosage Usage
Adult trees Strong roots, enhance tree vigor 500g/667㎡ Root irrigation

--When transplanting seedlings, 8-10g dissolved in 3-6L water, soak the seedlings for 5 minutes or evenly spray the roots until dripping, and then transplant; 
--after transplanting, 8-10g dissolved in 10-15L water to spray; 
--for For adult trees, this product can be used alone or mixed with other fertilizers, 500g/667㎡ when. watering the orchard, 1-2 times per season.

2)Inhibit shoot growth
At the beginning of the prosperous growth of new shoots, before flowering, spraying 100 ~ 500mg/L of liquid medicine had a significant inhibitory effect on the growth of new shoots of grapes, and the general growth amount was reduced by 1/3 ~ 2/3 compared with the control.  It should be noted that the effect of sprays on grape shoots increased with the increase of the concentration, but when the concentration was higher than 1000mg/L, the edge of the leaves would turn green and yellow;  

When the concentration exceeds 3000mg/L, the long-term damage is not easy to recover.  Therefore, it is necessary to control the concentration of grape sprays.  The control effect of the use of brassin is not consistent among grape varieties, so it is necessary to master the appropriate concentration of brassin shoot control according to local varieties and natural conditions.

Dotrazole soil application: 
Before germination, 6 ~ 10g of 15% dotrazole was applied to each grape (pure product was 0.9 ~ 1.5g).  After application, rake the soil to make the drug evenly distributed in 375px deep soil layer.  The internode length was not inhibited from 1 to 4 sections after application, and the internode length became significantly shorter after 4 sections.  Compared with the control group, the annual shoot length of 6g was 67%, 8g was 60%, and 10g was 52%.  

Foliar spraying: It was applied once a week after flowering, with an effective dose of 1000-2000mg /L.  The annual shoot growth was only about 60-2000px, which was about 60% of that of the control, and the flower spike formation in the second year was 1.6-1.78 times that of the control.  Foliar spray should be applied in the early stage of new shoot growth (generally at the end of flowering), and too late to inhibit the growth of new shoots is not obvious.

3) improve the fruit setting rate

The fruit setting rate can be increase by spraying 10 ~ 15mg/L liquid 1 ~ 2 times at the beginning flowering stage.On the 6th day after flowering, the grapes could be impregnated with 0.01mg/L brassinolide ~ 481 solution to improve the fruit setting rate.

The concentration of cytokinin in greenhouse cultivation is 5mg/L ~ 10mg/L, and the concentration of open-field cultivation is 2mg/L ~ 5mg/L immersed spike treatment, which can prevent falling flowers, and the gibberellin treatment in the production process is carried out as usual.

When the shoots were 15 ~ 1000px long, spraying 500mg/L of Meizhoun could promote the differentiation of winter buds on main vine.Spraying 300mg/L in the first 2 weeks of flowering or 1000 ~ 2000mg/L in the rapid growth period of secondary shoots can promote the differentiation of buds into flower buds.

However, after the application of the grape, the inflorescence axis is often shortened, the fruit grains are squeezed each other, affecting the ventilation and light transmission, and it is easy to get sick. If combined with low concentration of gibberellin, the inflorescence axis can be extended appropriately.

4) improve stress resistance, enhance plant growth
spray Sodium nitrophenolate 5000 ~ 6000 times after the emergence of new buds, and spray 2 ~ 3 times from 20d before flowering to just before flowering, and spray 1 ~ 2 times after the result.

It can promote fruit and fruit hypertrophy, continuous use can effectively enhance and restore tree potential, inhibit recession, and have a good promoting effect on product quality and taste.

spray 10 ~ 15mg/L liquid 1 ~ 2 times during the fruit  expanding stage, which could make the fruit grow fast, the size is uniform, the sugar content is increased, and the stress resistance is improved.

5) expand the fruit, improve the quality, increase production
Gibberellin is used to treat the growth hormone in the granulocytes after flowering, which promotes the elongation and enlargement of cells, while mobilizing the transport and accumulation of organic nutrients to the fruit grains,  increasing the contents of the flesh cells rapidly, thus increasing the fruit grains by 1 to 2 times, thus significantly improving the commodity value.                  

Although gibberellin  has the effect of increasing the fruit grain, it also has the negative effect of making the fruit stem brittle and easy to fall grain.
BA(6-carymethine) and streptomycin can be add in the use to prevent it.The specific combination method depends on the variety and the use method and needs to be determin by the test.

When using gibberellin to increase the fruit grain, it must be combined with good agricultural technology to obtain the ideal effect.
Cytokinin + gibberellin after flowering, at 10d and 20d, spraying with the mixed cytokinin and gibberellin once, which could make the drupeless fruit develop into the same size as the drupeless fruit, and the fruit could increase by 50%.

6. Mature early
Ethethylene is a fruit ripening agent, is a common drug for early coloring, the use of the concentration and period vary with the variety, generally used in the initial stage of berry ripening 100 to 500mg/L, colored varieties in 5% to 15% began to coloring, can be use 5 to 12days before ripening.
The results showed that when the fruit began to ripening, they could ripen 6 to 8 days earlier with 250-300 mg/L of ethephon.
With low concentration of gibberellin solution, the ripening stage of grape berries can be greatly advanced, and the fruit treated with gibberellin can be put on the market nearly 1 month earlier, and its economic benefit will be greatly improve.

7. Fruit denuclearization
Gibberellin is commonly impregnated by plastic large cups one by one.
The concentration of rosedew treated by impregnation method before flowering is 100mg/L, and the amount of drug used per piece is about 0.5mL.                      
After anthesis treatment, the increase  growth was about 1.5 mL per piece.
Artificial spike impregnation method was use for pre-flower treatment, and manual sprayer was used for shower spray after flower treatment.
Avoid days when the temperature is above 30 degrees Celsius from 12 a.m. on a sunny day or from 3 p.m. to sunset.

The relative humidity is about 80%, and can maintain 2d.                     
The weather is dry, easy to cause drug damage, and the treatment effect is not good in rainy days.
You should avoid this kind of weather when working in the field.                      
If a light rain falls after 8h of treatment, it can not be treated again, and if the rainfall is strong, it must be carried out again.
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