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Plant growth hormone functional classification and usage

Date: 2024-04-08 14:46:00
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Plant growth hormone is a type of pesticide used to regulate plant growth and development. It is a synthetic compound with natural plant hormone effects. It is a relatively special series of pesticides. It can regulate the growth and development of plants when the amount of application is appropriate

1. Functional classification of plant growth regulators
Prolong storage organ dormancy:
Maleic hydrazide, Naphthylacetic acid sodium salt, 1-naphthaleneacetic acid methyl ester.

Break dormancy and promote germination:
Compound Sodium Nitrophenolates (Atonik), Gibberellic Acid GA3, kinetin, thiourea, Chloroethanol, hydrogen peroxide.

Promote stem and leaf growth:
DA-6 (Diethyl aminoethyl hexanoate), Gibberellic Acid GA3, 6-Benzylaminopurine (6-BA), Brassinolide (BR), Triacontanol.

Promote rooting:
PINSOA root king,3-indolebutyric acid (IAA), Naphthalene acetic acid (NAA), 2,4-D, Paclobutrazol (Paclo), Ethephon, 6-Benzylaminopurine (6-BA).

Inhibit the growth of stems and leaf buds:
Paclobutrazol (Paclo), Chloromequat Chloride (CCC), mepiquat chloride, triiodobenzoic acid, maleic hydrazide.

Promote flower bud formation:
Ethephon, 6-Benzylaminopurine (6-BA), Naphthalene acetic acid (NAA), 2,4-D, Chlormequat Chloride (CCC).

Inhibits flower bud formation:Chlormequat Chloride (CCC), Krenite.

Thinning flowers and fruits: Naphthalene acetic acid (NAA), Ethephon, Gibberellic Acid GA3

Preserve flowers and fruits:
DA-6 (Diethyl aminoethyl hexanoate), forchlorfenuron (CPPU / KT-30), Compound Sodium Nitrophenolates (Atonik), 2,4-D, Naphthalene acetic acid (NAA), Gibberellic Acid GA3, Chlormequat Chloride (CCC), 6- Benzylaminopurine (6-BA).

Extend the flowering period:Paclobutrazol (Paclo), Chlormequat Chloride (CCC), Ethephon.

To induce the production of female flowers:
Ethephon., Naphthalene acetic acid (NAA), Indole-3-acetic acid (IBA)
, Indole-3-acetic acid (IBA).

To induce male flowers:Gibberellic Acid GA3.

Formation of seedless fruits:Gibberellic Acid GA3, 2,4-D, Gibberellic Acid GA3,6-Benzylaminopurine (6-BA).

Promote fruit ripening:
DA-6(Diethyl aminoethyl hexanoate), DA-6(Diethyl aminoethyl hexanoate)
, Compound Sodium Nitrophenolates (Atonik)

Delay fruit ripening:
2,4-D, Gibberellic Acid GA3, kinetin, 6-Benzylaminopurine (6-BA).
Delay aging: 6-Benzylaminopurine (6-BA), Gibberellic Acid GA3, 2,4-D, kinetin.

Increase amino acid content: Paclobutrazol (Paclo), PCPA, Ethychlozate

Promote fruit coloring: DA-6 (Diethyl aminoethyl hexanoate), forchlorfenuron (CPPU / KT-30), Compound Sodium Nitrophenolates (Atonik), Ethychlozate, Paclobutrazol (Paclo).

Increase fat content: 
Naphthalene acetic acid (NAA), Naphthalene acetic acid (NAA)

Improve stress resistance: abscisic acid, Paclobutrazol (Paclo), Chlormequat Chloride (CCC).

2.   How to use plant growth hormone

1.   Plant growth hormone seed soaking method
The seeds of crops are soaked in a growth regulator solution of a certain concentration, and after a certain period of time, the seeds are taken out and dried to facilitate sowing.   It should be noted that different crops and different purposes require the selection of different plant hormones, and the concentration and seed soaking time are determined according to the specific circumstances.   Therefore, it is necessary to carefully read the standard instructions for growth regulators and follow the instructions to ensure the effect of seed soaking and security.

2.   Plant growth hormone dipping method
The dipping method can be applied to rooting cuttings to improve the survival rate of the cuttings.   There are generally three methods of cutting cuttings: quick dipping, slow dipping, and powder dipping.

The quick-soaking method is to soak the cuttings in a high-concentration regulator for 2-5 seconds before cutting, and is suitable for plants that are easy to take root.   The slow-soaking method is to soak the cuttings in a lower-concentration regulator for a period of time, and is suitable for plants that are more susceptible to rooting.   Plants that are difficult to root;   the powder dipping method is to soak the base of the cuttings with water, then dip the cuttings in rooting powder mixed with auxin, and then insert them into the seedbed for cultivation.  

3.   Plant growth hormone spot application method
The spot coating method refers to using tools such as brushes or cotton balls to apply or brush a regulator solution of a certain concentration on the target treatment parts such as the leaves, stems, and fruit surfaces of plants.  This method is suitable for growth regulators on stems, leaves, and fruits , can promote plant growth and improve fruit quality.

4.   Plant growth hormone spraying method
Dilute the plant growth hormone into a certain proportion of liquid and put it into a sprayer.   After atomizing the liquid, spray it evenly and carefully on the surface of the plant, leaves and other parts that need to be treated to ensure smooth absorption by the plant.   At the same time, when spraying Be careful to avoid rainy days.

5.   Plant growth hormone root zone application method
The root zone application method refers to formulating plant growth regulators according to a certain concentration ratio and applying them directly around the root zone of the crops.   They are absorbed through the roots of the crops and transmitted to the entire plant to achieve the purpose of regulation and control.   For example, peach, pear, grape and other fruit trees can use paclobutrazol root zone application to control excessive branch growth.   It is easier to use the root zone application method, but the amount of pesticide used must be strictly controlled.

6.   Plant growth hormone solution drip method
Solution dripping is usually used to treat axillary buds, flowers or dormant buds at the top growth points of plants. The dosage is very precise. This method is often used in scientific research.
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