How to mix 920 plant growth regulator tomato

After the tomato is 70% flowered, spray the flowers with 10 20 milliliters of "920" solution, which can reduce flower drop, improve the fruit setting rate, and ripen early.

Precautions for using 920:

1) "920" aqueous solution is easy to fail, it is best to use it with it, and it should not be stored for a long time.

2) It must be combined with the application of sufficient fertilizer and water, otherwise it is easy to cause the leaves to turn yellow, the plants are weak, and the expected effect cannot be achieved.

3) The concentration should be accurate and the spraying should be uniform, otherwise it is easy to deform the stems, leaves and fruits, and affect the appearance of the product.

The generic name of 920 is gibberellin, which is a plant growth promoter, mainly sprayed on tomatoes during flowering, with a concentration of 30-35ml l, which can improve fruit setting rate and prevent hollow fruits.

Gibberellin, commonly known as ninety-two, is a broad-spectrum plant growth regulator, which has a wide range of uses, can promote cell elongation, accelerate the growth and development of plants, can increase the yield of products and improve the quality of products, and promote early maturity of plants; It can also break the dormancy of certain vegetable seeds (such as potatoes, peas, etc.) and promote germination; It can also change the ratio of male flowers and female flowers of melon vegetables to prevent flowers from falling off, improve the fruiting rate, and form seedless fruits; It can also promote the expansion of the leaves of some leafy vegetables (such as spinach and amaranth).

Specific usage: 1. Improve the fruit setting rate of cucumber, eggplant and tomato: spray flowers with 800 times of 4% gibberellin emulsifiable concentrate during the flowering period.

2. Make celery, spinach, and loose-leaf lettuce leaves hypertrophied: 20 days before harvesting, spray the foliar surface with 4000 times of 4% gibberellin emulsifiable concentrate, and spray it once every 5 days (this is the most common usage that growers have mastered at present).

3. Promote the germination of potatoes, peas and lentils: soak seeds for 24 hours with 800 times of 4% gibberellin emulsifiable concentrate, and sow seeds after removal (due to the wound of the incision, the potatoes also need to be disinfected with plant ash or other agents).

4. Promote cucumber and watermelon to bloom more female flowers: at the 1-leaf stage of cucumber, spray with 4% gibberellin EC 500 times, and spray with 4% gibberellin EC 8000 times at the 2-3 leaf stage of watermelon.

5. In addition, spraying melon with 4% gibberellin EC 2000-4000 times before watermelon harvesting can also effectively extend the storage period of watermelon.

When using gibberellin, it should be noted that: first of all, the concentration should be accurate (be sure to read the instructions, the above concentration is 4% gibberellin EC, and there are other dosage forms and other concentrations in the production, so it cannot be the same, and the same is true for several other types of plant growth regulators introduced below), too high concentration is easy to make the plant lose green, or even die, and it is easy to make the product deformed. Pure gibberellin is difficult to dissolve in water, you can first use alcohol or high-concentration soju to dissolve first, and then add water to the required concentration, do not use more than 50 hot water to mix the solution, use it immediately after preparing the solution, it is easy to fail after long-term storage.

(1) It must be combined with cultivation measures. Growth regulators are not nutrients, which can only regulate the growth and development of flowers, but cannot replace the conditions such as temperature, light, water and fertilizer that promote the healthy growth of flowers.

2) It should be carried out appropriately according to the purpose of use and the development stage of the flower. If the period of use is not appropriate, the effect is not good, and even plays a good role.

3) Calculate the dosage and control the concentration of the drug. The dose is the amount of drug received per plant or unit area, and the concentration is determined under the premise of determining the dose when used. If the concentration is too low, the effect is poor; If the concentration is too high, it will destroy the normal physiological activities of the plant and even harm the plant.

4) Different plant growth regulators, matters that should be paid attention to when using. For example, the leaves should not be contaminated when the plant is treated with indole butyric acid solution; Gibberellin, chlormequatin, etc. cannot be mixed with alkaline pesticides or fertilizers; It cannot be mixed with acidic pesticides or copper pesticides, nor can it be in contact with copper containers, so as to avoid pesticide damage to plants; Paclobutrazol should be sprayed on the plant stalks when spraying, and if the leaves are sprayed, the effect will be reduced.

5) The effective time of different types of growth regulators is different. Plant growth regulators have a certain expiration date when stored at room temperature, and they will be invalid when they expire. For example, gibberellin crystalline powder is generally valid for 2 years.

After making a diluted solution, it can only be stored for about 1 week even if it is stored in the refrigerator. Bijiu powder can be stored for 3 years under dry conditions, but its stability in aqueous solution is only 2 to 3 months. Therefore, the solution of the growth regulator should be used with the preparation to avoid reducing the effect or completely ineffective.

Problems that should be paid attention to when using plant growth regulators in tomatoes:

Metal containers cannot be used for the preparation of pharmaceutical liquids, but glass, enamel or ceramic containers can be used.

The concentration must be strictly controlled in accordance with the requirements of the product manual, and the concentration should not be too high, and the dosage should not be too large, so as to prevent deformed fruits or cause drug damage.

Half-open or fully bloomed flowers work best when treating flowers with plant growth regulators, and treatment of old flowers or small buds is ineffective.

The liquid medicine should not be sprinkled on the growth point and young leaves, so as not to shrink and stiffen the stems and leaves, affect photosynthesis, and even cause pesticide damage such as growth retardation and yield decline.

Treated flowers cannot be left to be planted.

Avoid operating at noon high temperatures, generally choose to operate before 10 a.m. and after 3 p.m., and the temperature of the shed should be 18 20.

Do not repeat the dipping of flowers or too much medication, do not dip the flower buds and flowers that are not fully opened, and increase fertilizer and water in time after dipping the flowers to ensure the normal growth and development of the fruit.

For example, gibberellin can be used to prevent fruit drop.

Yes, please be sure to pay attention to the period of use and dosage. It is recommended to do a small test in advance to avoid the appearance of ***.

Belch.. The agricultural knowledge of the agricultural support network is quite complete, you can see if there is an introduction.

Plant growth regulator is an umbrella term, what products are you using right now? What are the main ingredients?

Take the commonly used Chunyu No. 1 of Zhongwei Happy Forest as an example, the main role is to enhance plant photosynthesis, increase plant cell vitality, promote metabolism, and at the same time product efficacy, broad-spectrum and low toxicity, can promote roots and strong seedlings, except for individual flowers and flowers are not recommended to use, other crops can be used.

You can also experiment first, and it will not affect the use of large areas.

Auxins: 2,4-D,2,4,5-T naphthalene acetic acid, indoleacetic acid, etc. On citrus, treatment with 100 250mg kg2,4-d can effectively prevent the formation of strata at the end of the fruit stalk, keep the fruit pedicle bright green, prevent the invasion of pedicle rot and black rot bacteria, and greatly reduce rot.

Kinetin: 6-benzyladenine (6-BA) is the most commonly used in postharvest fruit treatment, especially for green fruits.

Gibberellin: Gibberellin has the effect of inhibiting the decomposition of chlorophyll in melons and fruits. Treatment of citrus fruits delayed chlorophyll loss, carotene appearance, and increased peel firmness and thickness.

Bijiu (B9): Pre-harvest treatment of apples can not only prevent fruit drop before harvest, but also effectively maintain fruit hardness and reduce respiration after harvest, and the concentration used is 1000 4000mg kg.

Ethephon: Ethephon is a substance that can release ethylene and is in liquid form. In the case of dilution or pH greater than 4, ethylene is liberated.

The prepared solution is sprayed or dipped in bananas, dried naturally after treatment, and generally stored for 3 to 4 days to mature. Ethylene is used in persimmon astringency, and the spreading agent is added to the 250 500mg kg ethephon solution, sprayed or soaked in the fruit, and the astringency can be deastringent and mature after about 4 days.

Sodium dehydroacetate: Sodium dehydroacetate treatment of fruits such as strawberries can inhibit the activity of respiratory enzymes, thereby delaying the ripening of fruits. It is a promising microbial anti-agent, with antiseptic effect at low concentrations and no odor, and its preservative effect varies with pH.

Ethylene absorber: Generally, ethylene absorbent is used to adsorb ethylene released by tissues. Commonly used adsorbents are brominated activated carbon, molecular sieve, coke molecular sieve and diatomaceous earth, vermiculite, foam bricks containing saturated potassium permanganate solution, etc., in bananas, apples and other modified atmosphere storage, the application of ethylene absorbent has achieved obvious results.

Ampat mequatin, paclobutrazol, naphthalene acetic acid, amine fresh ester DA-6, clopyride KT-30, ethephon, uniconazole, potassium indole butyrate, gibberellic acid GA3, calcium cyclic acid, brassinolide Plant growth regulator.