Analysis of Plant Growth Enhancer Types
I. Fruit Enlargement Agents
These are primarily used to promote fruit cell division or elongation, increasing fruit set rate and individual fruit weight. They are commonly used in the production of fruits such as grapes, strawberries, and apples.
1. Gibberellic Acid (GA3)
Action: Promotes cell elongation, causing longitudinal fruit growth. Commonly used in seedless grapes and strawberries.
Application Examples:
Grapes: Spraying with a 20-50 mg/L solution after flowering can increase berry size (e.g., seedless white grapes).
Strawberries: Spray only the flowers and fruits, avoiding excessive vegetative growth of the plant. However, potassium and calcium supplementation is needed to prevent fruit softening.
2. Cytokinins
Main components: Forchlorfenuron (CPPU / KT-30), Thidiazuron (TDZ), 6-Benzylaminopurine (6-BA), 6-Furfurylaminopurine Kinetin (6-KT), Zeatin, etc.
Action: Promotes lateral cell division, increasing fruit diameter. Excessive use may delay ripening or affect taste.
Application Examples:
Grapes: Using 5 mg/L CPPU on Fujiminori grapes can increase individual fruit weight to 16.6 grams.
Apples: Spraying with chlorpyrifos during full bloom can improve fruit shape index and hardness.
Auxins (Sodium 1-Naphthyl Acetic Acid, Indole-3-Butyric Acid IBA)
Action: Attracts nutrients to the fruit, promoting enlargement. Often used in combination with other regulators.
Application Examples: Used in combination with gibberellin and borax for Kyoho grape enlargement.
II. Root and Tuber Enlargement Agents
These are primarily used to promote cell division and nutrient accumulation in underground root and tuber crops (such as potatoes, ginger, and garlic).
(Choline Chloride + Naphthyl Acetic Acid)
Function: Enhances photosynthesis, promotes the transport of photosynthetic products to the underground parts, and accelerates enlargement.
Application Example:
Spraying with 18% wettable powder during the garlic bulb enlargement stage can increase yield by more than 30%.
Using it during the three-branch stage of ginger growth results in larger and more tender ginger rhizomes.
Forchlorfenuron (CPPU / KT-30) + GA3 + DA-6
Function: A compound that regulates cell division and elongation, suitable for onions, potatoes, etc.
Application Example: Quickly absorbed after spraying, promoting the enlargement of underground roots and tubers.
Thidiazuron (TDZ)
Function: Delays senescence, improves stress resistance, and promotes uniform tuber enlargement.
Application Example: Spraying during the early stage of onion enlargement inhibits bolting and increases diameter.
Other Ingredients
Enlargement factors (such as DA-6): Accelerate the transport of photosynthetic products and improve tuber quality.
Rare earth elements: Enhance disease resistance, extend the functional period of leaves, and indirectly promote enlargement.
Precautions:
1. Standardized Use: Both types of enlargement agents must be used at the recommended concentrations and times. Overuse may lead to deformed fruits, cracking, or reduced quality.
2. Safety: The enlargement agents permitted for use in my country (such as GA3 and Forchlorfenuron) are low in toxicity and have low residue risks, but reasonable application is necessary to ensure good taste.
These are primarily used to promote fruit cell division or elongation, increasing fruit set rate and individual fruit weight. They are commonly used in the production of fruits such as grapes, strawberries, and apples.
1. Gibberellic Acid (GA3)
Action: Promotes cell elongation, causing longitudinal fruit growth. Commonly used in seedless grapes and strawberries.
Application Examples:
Grapes: Spraying with a 20-50 mg/L solution after flowering can increase berry size (e.g., seedless white grapes).
Strawberries: Spray only the flowers and fruits, avoiding excessive vegetative growth of the plant. However, potassium and calcium supplementation is needed to prevent fruit softening.
2. Cytokinins
Main components: Forchlorfenuron (CPPU / KT-30), Thidiazuron (TDZ), 6-Benzylaminopurine (6-BA), 6-Furfurylaminopurine Kinetin (6-KT), Zeatin, etc.
Action: Promotes lateral cell division, increasing fruit diameter. Excessive use may delay ripening or affect taste.
Application Examples:
Grapes: Using 5 mg/L CPPU on Fujiminori grapes can increase individual fruit weight to 16.6 grams.
Apples: Spraying with chlorpyrifos during full bloom can improve fruit shape index and hardness.
Auxins (Sodium 1-Naphthyl Acetic Acid, Indole-3-Butyric Acid IBA)
Action: Attracts nutrients to the fruit, promoting enlargement. Often used in combination with other regulators.
Application Examples: Used in combination with gibberellin and borax for Kyoho grape enlargement.
II. Root and Tuber Enlargement Agents
These are primarily used to promote cell division and nutrient accumulation in underground root and tuber crops (such as potatoes, ginger, and garlic).
(Choline Chloride + Naphthyl Acetic Acid)
Function: Enhances photosynthesis, promotes the transport of photosynthetic products to the underground parts, and accelerates enlargement.
Application Example:
Spraying with 18% wettable powder during the garlic bulb enlargement stage can increase yield by more than 30%.
Using it during the three-branch stage of ginger growth results in larger and more tender ginger rhizomes.
Forchlorfenuron (CPPU / KT-30) + GA3 + DA-6
Function: A compound that regulates cell division and elongation, suitable for onions, potatoes, etc.
Application Example: Quickly absorbed after spraying, promoting the enlargement of underground roots and tubers.
Thidiazuron (TDZ)
Function: Delays senescence, improves stress resistance, and promotes uniform tuber enlargement.
Application Example: Spraying during the early stage of onion enlargement inhibits bolting and increases diameter.
Other Ingredients
Enlargement factors (such as DA-6): Accelerate the transport of photosynthetic products and improve tuber quality.
Rare earth elements: Enhance disease resistance, extend the functional period of leaves, and indirectly promote enlargement.
Precautions:
1. Standardized Use: Both types of enlargement agents must be used at the recommended concentrations and times. Overuse may lead to deformed fruits, cracking, or reduced quality.
2. Safety: The enlargement agents permitted for use in my country (such as GA3 and Forchlorfenuron) are low in toxicity and have low residue risks, but reasonable application is necessary to ensure good taste.
