Effects of Brassinolide and DA-6 Combination
Brassinolide and Diethyl aminoethyl hexanoate (DA-6) are commonly used plant growth regulators in agricultural production, and their mixing has always been a focus of attention for farmers and agricultural technicians. This article will analyze the mechanisms of action, effects of mixing, precautions, and practical application cases of the two agents to provide scientific reference for agricultural production.
I. Differences in the Mechanisms of Action between Brassinolide and Diethyl Aminoethyl Hexanoate
Brassinolide belongs to the sterol plant hormone class, promoting cell division and elongation by regulating the activity of various enzymes in plants. Its core functions are reflected in three aspects:
First, enhancing photosynthetic efficiency and increasing chlorophyll content;
Second, activating the plant's stress resistance system and alleviating stresses such as pesticide damage and frost damage;
Third, coordinating nutrient distribution and promoting fruit enlargement. Experimental data from the Chinese Academy of Agricultural Sciences in Shandong in 2023 showed that using 0.01% Brassinolide could increase the number of grains per ear of wheat by 12%-15%.
DA-6, a synthetic growth promoter, primarily works by increasing the activity of peroxidase in plants. Its unique advantages include: rapidly breaking seed dormancy and promoting germination; enhancing root absorption of micronutrients; and improving crop growth under low-light conditions. Comparative experiments conducted by the Jiangsu Agricultural Technology Extension Station showed that rice seedlings treated with Diethyl aminoethyl hexanoate (DA-6) exhibited over 30% increased root vigor.
II. Synergistic Effects of Scientific Mixing
According to the "Guidelines for Compound Plant Growth Regulators" published by the National Agricultural Technology Extension Service Center in 2024, the two can produce significant synergistic effects when mixed under specific conditions:
1. Functional Complementarity: Brassinolide focuses on overall regulation, while Diethyl aminoethyl hexanoate (DA-6) enhances local absorption; the mixture forms a dual regulation of "macro + micro". In wheat trials conducted by the Zhoukou Agricultural Research Institute in Henan Province, the mixed treatment increased yield by 8.3% compared to using either treatment alone.
2. Synergistic effect of stress resistance: When dealing with drought stress, the mixture can increase the proline content of crops by 2.1 times, far exceeding the effect of a single formulation.
3. Extended efficacy: Diethyl aminoethyl hexanoate (DA-6) has a half-life of about 7 days. When combined with Brassinolide (half-life 10-12 days), the duration of efficacy can be extended to about 15 days.
III. Key Blending Techniques
1. Concentration Ratio: The recommended ratio is 0.0075% Brassinolide + 8% aminoethyl soluble powder. Field trials conducted by the Anhui Plant Protection Station showed that this ratio controlled cotton boll shedding by 76.8%.
2. Application Timing: Optimal results are achieved during sensitive crop stages (such as tillering and young fruit stages). Apple trials at the Shaanxi Fruit Industry Center showed that application 7 days after flowering increased fruit set by 19%.
3. Environmental Requirements: Avoid application when temperatures exceed 30℃ or air humidity is below 40%. During the hot and dry winds in Hebei in 2024, winter wheat treated in the afternoon showed a 35% increased probability of leaf curling.
IV. Precautions and Risk Control
1. Contraindications:
- Do not mix with alkaline pesticides (such as Bordeaux mixture) or copper-containing preparations.
- Not recommended for use when crops are suffering from severe pests or diseases.
- Reduce dosage by 20% for greenhouse cultivation.
2. Abnormal Treatment: If leaf wrinkling occurs, immediately spray with clean water and apply a 0.3% urea solution. An emergency treatment case from a cotton field in Xinjiang Production and Construction Corps in 2025 showed that the symptoms of pesticide damage could be alleviated within 24 hours.
3. Testing Method: It is recommended to conduct a small-scale test after mixing. Simple test method: Apply a small amount of the mixture to the surface of cabbage leaves; if no brown spots appear after 24 hours, it is safe.
I. Differences in the Mechanisms of Action between Brassinolide and Diethyl Aminoethyl Hexanoate
Brassinolide belongs to the sterol plant hormone class, promoting cell division and elongation by regulating the activity of various enzymes in plants. Its core functions are reflected in three aspects:
First, enhancing photosynthetic efficiency and increasing chlorophyll content;
Second, activating the plant's stress resistance system and alleviating stresses such as pesticide damage and frost damage;
Third, coordinating nutrient distribution and promoting fruit enlargement. Experimental data from the Chinese Academy of Agricultural Sciences in Shandong in 2023 showed that using 0.01% Brassinolide could increase the number of grains per ear of wheat by 12%-15%.
DA-6, a synthetic growth promoter, primarily works by increasing the activity of peroxidase in plants. Its unique advantages include: rapidly breaking seed dormancy and promoting germination; enhancing root absorption of micronutrients; and improving crop growth under low-light conditions. Comparative experiments conducted by the Jiangsu Agricultural Technology Extension Station showed that rice seedlings treated with Diethyl aminoethyl hexanoate (DA-6) exhibited over 30% increased root vigor.
II. Synergistic Effects of Scientific Mixing
According to the "Guidelines for Compound Plant Growth Regulators" published by the National Agricultural Technology Extension Service Center in 2024, the two can produce significant synergistic effects when mixed under specific conditions:
1. Functional Complementarity: Brassinolide focuses on overall regulation, while Diethyl aminoethyl hexanoate (DA-6) enhances local absorption; the mixture forms a dual regulation of "macro + micro". In wheat trials conducted by the Zhoukou Agricultural Research Institute in Henan Province, the mixed treatment increased yield by 8.3% compared to using either treatment alone.
2. Synergistic effect of stress resistance: When dealing with drought stress, the mixture can increase the proline content of crops by 2.1 times, far exceeding the effect of a single formulation.
3. Extended efficacy: Diethyl aminoethyl hexanoate (DA-6) has a half-life of about 7 days. When combined with Brassinolide (half-life 10-12 days), the duration of efficacy can be extended to about 15 days.
III. Key Blending Techniques
1. Concentration Ratio: The recommended ratio is 0.0075% Brassinolide + 8% aminoethyl soluble powder. Field trials conducted by the Anhui Plant Protection Station showed that this ratio controlled cotton boll shedding by 76.8%.
2. Application Timing: Optimal results are achieved during sensitive crop stages (such as tillering and young fruit stages). Apple trials at the Shaanxi Fruit Industry Center showed that application 7 days after flowering increased fruit set by 19%.
3. Environmental Requirements: Avoid application when temperatures exceed 30℃ or air humidity is below 40%. During the hot and dry winds in Hebei in 2024, winter wheat treated in the afternoon showed a 35% increased probability of leaf curling.
IV. Precautions and Risk Control
1. Contraindications:
- Do not mix with alkaline pesticides (such as Bordeaux mixture) or copper-containing preparations.
- Not recommended for use when crops are suffering from severe pests or diseases.
- Reduce dosage by 20% for greenhouse cultivation.
2. Abnormal Treatment: If leaf wrinkling occurs, immediately spray with clean water and apply a 0.3% urea solution. An emergency treatment case from a cotton field in Xinjiang Production and Construction Corps in 2025 showed that the symptoms of pesticide damage could be alleviated within 24 hours.
3. Testing Method: It is recommended to conduct a small-scale test after mixing. Simple test method: Apply a small amount of the mixture to the surface of cabbage leaves; if no brown spots appear after 24 hours, it is safe.
