Plant growth regulators are very commonly used pesticides in agriculture. They play an important role in regulating plant growth, rooting, germination, flowering, fruiting, maturation and shedding. However, if used unreasonably, it is easy to cause phytotoxicity!

The following highlights some classic formulas of plant growth regulators!

1. Compounding of plant growth regulators

In the past, people thought that plant growth regulators were specific and could not be used in combination. However, modern plant physiology research has proved that different plant growth regulators will produce unexpected good effects when used in combination. After the compound use of growth promoter and growth inhibitor, it is found that for some plants, it can inhibit vegetative growth and promote reproductive growth. While controlling vigorous growth and lodging resistance of plants, it can make fruits expand, increase yield and improve quality.

1. Sodium nitrophenolate + sodium naphthalene acetate

It is a labor-saving, low-cost, high-efficiency and high-quality new composite plant growth regulator. Sodium nitrophenolate, as a regulator that comprehensively regulates the growth balance of crops, can promote crop growth in an all-round way, and compounded with sodium naphthalene acetate, on the one hand, it can strengthen the rooting effect of sodium naphthalene acetate, and on the other hand, it can enhance the rooting effect of sodium nitrophenolate Quick-acting, the two are promoted together, so that the rooting effect is faster, the absorption of nutrients is stronger and more comprehensive, and it is accelerated to promote the expansion and robustness of crops, no lodging, strong internodes, more branches and tillers, disease resistance, and lodging resistance.

According to the joint test research of many scientific research institutes, it is shown that sodium nitrophenolate and sodium naphthalene acetate are compounded according to the ratio of 1:3 and applied to the rooting of rootstocks. The results show that the number of roots is significantly higher than that of sodium naphthalene acetate alone; It shows that the two can significantly promote the thickening of soybean root system, the ability of nitrogen-fixing bacteria in rhizobia is significantly enhanced, and the obvious appearance direct-viewing effect is shown in 2-3 days; Spray the double water solution on the leaves of wheat at the rooting stage for 2-3 times, which can increase the yield by about 15%, and has no adverse effect on the quality of wheat.

2. DA-6+ethephon (or sodium nitrophenolate+ethephon)

It is a kind of dwarf, strong and anti-falling regulator specially used for compound corn. Using ethephon alone shows dwarfing effect, widened leaves, dark green leaves, upward leaves, and increased secondary roots, but premature senescence of leaves is prone to occur. The DA-6+ethephon compound agent is used to control the prosperity of corn, and the compound use can reduce the strain by up to 20% compared with the single use of ethephon, which has obvious synergistic and anti-aging effects.

3. Sodium nitrophenolate + gibberellin

Sodium nitrophenolate and gibberellin are used as quick-acting regulators, both of which can act in a short time after application, so that the crops show a good growth effect, and sodium nitrophenolate and gibberellin are used in combination, according to Zhongmu County Jujube Science Research Institute applied compound sodium nitrophenolate research to show that while adding the effects of the two, compound nitrophenolate sodium’s long-lasting characteristics can make up for this defect of gibberellin. At the same time, through comprehensive regulation of growth balance, Avoid damage to the plant body caused by excessive use of gibberellin, thereby significantly increasing the yield and quality of jujube trees.

4. Sodium naphthalene acetate + indole butyrate

It is the most widely used compound rooting agent in the world, and it is widely used in fruit trees, forest trees, vegetables, flowers and some ornamental plants. The mixture can be absorbed by roots, leaves, and germinated seeds, and stimulates the division and growth of cells in the inner sheath of the root, making the lateral roots grow faster and more, improving the ability of the plant to absorb nutrients and water, and achieving the overall growth and robustness of the plant. Since the agent often has a synergistic or additive effect in promoting the rooting of plant cuttings, some plants that are difficult to take root can also be rooted.

2. Compounding of plant growth regulator and fertilizer

1. Sodium nitrophenolate + urea

Sodium nitrophenolate + urea can be described as the "golden partner" in the compounding of regulators and fertilizers. In terms of effect, the comprehensive regulation of crop growth and development of sodium nitrophenolate can make up for the lack of nutrients in the early stage, so that crop nutrition is more comprehensive and urea utilization is more thorough; Combined with the long-acting effect and the quick-acting effect of urea, the appearance and internal changes of the plant will be faster and more durable; in terms of the method of action, sodium nitrophenolate and urea can be used in combination, which can be used as base fertilizer or as root spray. Fertilization can be described as "kill three birds with one stone". In the test of compound sodium nitrophenolate and urea-containing foliar fertilizer, within 40 hours after application, the leaves of the plants became dark green and shiny, and the yield in the later stage was significantly increased.

2. Triacontanol + potassium dihydrogen phosphate

Triacontanol can increase the photosynthesis of crops, and spraying it with potassium dihydrogen phosphate can increase crop yield, and the two can be combined with other fertilizers or regulators to apply to the corresponding crops, and the effect will be better. For example, the combination of triacontanol + potassium dihydrogen phosphate + sodium nitrophenolate can increase the yield by more than 20% compared with the former two alone.

3. DA-6 + trace elements + N, P, K

Hundreds of test data and market feedback information show that the compound application of DA-6 with macroelements and trace elements: DA-6+ trace elements such as zinc sulfate; DA-6+ macroelements such as urea, potassium sulfate, etc., all make fertilizer It exerts the efficacy dozens of times higher than that of single use, and at the same time enhances the plant's disease resistance and stress resistance. The good combination selected from a large number of experiments, together with certain additives, is provided to customers, which benefits customers a lot.

4. Chlormequat + boric acid

The mixture is applied on grapes to overcome the deficiency of chlormequat. Experiments have shown that spraying the whole plant with a certain concentration of chlormequat 15 days before the flowering of the grapes can greatly increase the yield of the grapes, but reduce the sugar content in the grape juice. The mixture can not only play the role of chlormequat in controlling growth, promoting fruit setting and increasing yield, but also can overcome the side effect of reducing sugar content of chlormequat after use.

3. Plant growth regulator + fungicide

1. Sodium nitrophenolate + acetoallicin

The combined use of sodium nitrophenolate and allicin can significantly improve its efficacy and delay the emergence of drug resistance, and can resist the damage caused by excessive or high toxicity of drugs by regulating crop growth, and make up for the losses caused by it. Experimental research on the control of cotton fusarium wilt with complex sodium nitrophenolate + acetoallicin EC showed that the incidence rate of compound sodium nitrophenolate was reduced by 18.4% compared with single use of acetoallin, and the compound preparation treatment was stronger than the control cotton, and the leaves were darker. Green, plump, late decline time in the later stage, prolonging the functional period of leaves.

2. Sodium nitrophenolate + carbendazim

Sodium nitrophenolate is mixed with fungicide to improve the surface activity of the agent, increase penetration and adhesion, etc., thus increasing the bactericidal effect. Sodium nitrophenolate and heterocyclic fungicides, such as carbendazim, are used in combination. In the prevention and control of peanut leaf diseases, spraying twice at the early stage of the disease can increase the control effect by 23%, and significantly enhance the bactericidal effect.

3. Brassinolide + Triadimefon

Brassinolide can promote the germination of crops, trees and seeds, promote the growth of seedlings, and improve the stress resistance of crops. According to relevant literature reports: the combination of brassinolide and triadimefon has a control effect on cotton blight of more than 70%, and at the same time promotes the growth of cotton roots and buds. Studies have also shown that salicylic acid also has a significant synergistic effect on triadimefon.

4. Plant growth regulator + herbicide

1. Ethephon + Paraquat

For crop defoliants. When the agent is used as a dry defoliation agent for sesame, it can increase yield. If spraying with ethephon alone 6 days before sesame harvest, the effect of dry defoliation is poor, and sesame does not increase yield. Although paraquat alone has a good effect of dry defoliation, it does not Yield increase, if the two are used in combination, not only the effect of drying and defoliation is better, but also the yield is increased compared with the control.

5. Compounding technology of other plant growth regulators

1. Compounding of rooting agent: it mainly promotes the rooting and slowing down of seedlings after transplanting, or the cutting of seedlings, etc. The types are auxin + soil fungus, auxin + catechol, indole acetic acid + naphthalene acetic acid, auxin + saccharin, abscisic acid + auxin, fulvic acid + indole butyric acid, etc.

2. Promoting fruit setting agent: the function is to increase the parthenocarpic rate, increase the single weight of fruit, promote fruit setting, accelerate the expansion speed of fruit, and increase the size of fruit. The types are gibberellin + cytokinin, gibberellin + auxin + 6-BA, gibberellin + naphthaleneoxyacetic acid + diphenylurea, gibberellin + kanamycin, gibberellin + brassin Lactone, gibberellin + naphthyloxyacetic acid + micronutrient elements, etc.

3. Inhibitory fruit-setting agent, grain yield-increasing agent: the function is to control vigorous growth and increase fruit-setting rate. The types are chlormequat + choline chloride, chlormequat + ethrene, chlormequat + abscisic acid, chlormequat + ethrene + copper sulfate, chlormequat + pyrimidinol, chlormequat + Gibberellin, abscisic acid + gibberellin, etc.

4. Breaking dormancy growth promoter: the function is to break dormancy and promote germination. The types include gibberellin + thiourea, potassium nitrate + thiourea, benzylaminopurine + naphthalene acetic acid + nicotinic acid, gibberellin + KCl, gibberellin + Fospinol, etc.

5. Dry defoliation agent: mainly used for sesame, cotton, etc., to dry and defoliate before mechanical harvesting. Its function is not only the effect of drying and defoliation, but also the effect of increasing yield. Its types include thiazolone + paraquat, thiazolon + methamidophos, thiazolon + potassium carbonate, thiazolon + ammonium persulfate, thiazolon + diuron, thiazolon + endotol + cycloheximide Wait.

6. Ripening and coloring agent for improving quality: It has the functions of accelerating fruit ripening, making the color bright, and increasing the sweetness of the fruit. Its types include Divinyl + Accelene, Divinyl + Cyclodextrin Complex, Divinyl + 2,4,5-T-propionic Acid, Diuron + Citric Acid, Benzylaminopurine + Kasugamycin, etc.

7. Vegetables and fruits, fruit picking agent: Applied before apples and citrus are about to ripen, to promote the formation of a separation layer at the base of citrus fruit stems, resulting in the separation of fruits and branches. The types are: naphthaleneacetamide + divinyl, dinitro-o-cresol + naphthylacetamide + divinyl, naphthaleneacetamide + carbaryl, dinitro-o-cresol + naphthaleneacetamide + carbaryl, Naphthalene acetic acid + carbaryl, etc.

8. Promote flower bud development, flowering and sex ratio: make fruit crops transform from vegetative growth to reproductive growth, and promote flowering. The types include naphthalene acetic acid + benzylaminopurine, benzylaminopurine + gibberellin, gibberellin + silver thioband sulfate, ethephon + potassium dichromate, etc.

9. Sprout inhibitor: inhibit the germination of axillary buds on tobacco, and inhibit the germination of potatoes during storage. Its types include cyanogen + cyanogen, chlorphenamine + anilline, sucrose fatty acid ester + cyanogen, etc.

10. Growth-promoting and yield-increasing agent: improve the absorption of N, P, and K by plants, and increase the yield. Its types include indole acetic acid + naphthalene acetic acid, indole acetic acid + naphthalene acetic acid + 2,4-D + gibberellin, boosterin + cytokinin + auxin, hydrogen peroxide + wood acetic acid, etc.

11. Anti-stress agent (drought resistance, low temperature resistance, disease resistance, etc.): increase the absorption of nutrients, promote the growth of seedlings, increase the total dry matter, improve cold resistance, drought resistance, disease resistance, and insect resistance. The types include antikinetin + abscisic acid, cytokinin + auxin + gibberellin, ethene + gibberellin, salicylic acid + gene active agent, etc.