Shandong Changrui Biotech Co., Ltd. is one of the leading manufacturers and suppliers of paclobutrazol powder in China. Please feel free to wholesale bulk high purity paclobutrazol powder in stock here from our factory. All our raw materials are with high quality and competitive price. Contact us for pricelist.
Product Introduction
As a triazole plant growth regulator, Paclobutrazol Powder inhibits gibberellin biosynthesis to suppress vegetative overgrowth. It is absorbed by crop roots, stems and leaves with systemic upward translocation, shortening internodes, thickening stems and promoting root development. It boosts flower bud differentiation and improves stress tolerance for fruit trees, cereals and ornamental crops. As a core technical raw material for foliar spray and root irrigation formulations, It helps growers control excessive plant growth, optimize canopy structure and increase fruit setting rate.
Technical Specifications
|
Property |
Specification |
|
Appearance |
Off-white to white crystalline powder |
|
Active Ingredient Content |
≥95.0% |
|
Melting Point |
165℃–166℃ |
|
Moisture |
≤0.5% |
|
Acidity (as H₂SO₄) |
≤0.3% |
|
Insoluble Residue |
≤0.2% |
|
pH Range |
5.0–7.0 |
|
Volatile Impurities |
Compliant with industrial technical standards |
|
Solubility in Water |
26 mg/L at 20°C| |
|
Solubility in Organic Solvents |
Soluble in methanol, acetone, cyclohexanone, dichloromethane |
Health Benefits & Values
Gibberellin Biosynthesis Suppression
Inhibits key enzymes in gibberellin biosynthesis (GA20-ox, GA3-ox) and increases indoleacetic acid oxidase activity, reducing endogenous auxin levels to restrain internode elongation and prevent excessive vegetative growth.
Systemic Acropetal Translocation
Absorbed by roots and foliage, transported upward within vascular tissues to deliver uniform growth regulation across the whole plant.
Optimize Plant Morphology & Strengthen Stems
Shortens internodes and thickens stalks, reducing lodging risk and improving crop canopy light transmission.
Optimize Source-Sink Relationship & Promote Flower Bud Differentiation
Redirects assimilates from vegetative to reproductive growth, stimulating flower bud formation and supporting stable fruit setting and yield improvement.
High Purity Reduces Formulation Risk
Low impurity content lowers phytotoxicity risk and meets requirements for premium plant regulator finished products.
Ecological Safety Considerations
Low toxicity to bees, silkworms, and aquatic organisms. Avoid application during flowering periods and near apiaries, mulberry fields, and water bodies. Do not mix with alkaline substances.
Extended Soil Residual Activity
Soil residual activity lasts 2 months or longer, potentially up to 2 years under cool conditions. Plan crop rotation carefully to avoid inhibition of subsequent sensitive crops
Core Value in Formulation Development
High-Purity Technical Reduces Formulation Hazards
The ≥95% high-purity Paclobutrazol Powder adopts standardized purification process with low heavy metal and impurity content, lowering phytotoxicity risk and meeting requirements for premium plant regulator finished products.
Formula Simplification for Growth Regulation
Single active ingredient addresses both vegetative control and reproductive promotion, reducing the need for multiple actives in finished formulations.
Multi-Dosage Form Process Adaptability
Suitable for wettable powder, suspension concentrate, aqueous solution and water dispersible granule, matching foliar spraying and root irrigation workflows.
Good Compatibility for Combined Formulations
Compatible with many neutral or acidic agrochemicals. Combined formulas integrate growth regulation with pest or disease management.
Consistent Storage Stability
Crystalline structure maintains reliable chemical stability under dry, shaded storage, resisting decomposition and preserving stable efficacy throughout finished product shelf life.
End-Application Scenarios
Vegetative Growth Control (Core Track)
Suppresses excessive shoot growth for fruit trees, rice, wheat and ornamental plants, reducing lodging risk and optimizing canopy structure.
Flower Bud Differentiation Promotion
Applied on fruit trees during the appropriate phenological stage to improve fruit setting performance.
Root Drench Treatment
Used via soil root irrigation for nursery stock and fruit trees to control top vigor and develop robust root systems.
Mixed Agrochemical Formulation Development
Serves as core active ingredient for combined plant regulator formulations, matched with fungicides or insecticides for integrated crop management.
High-Value Horticulture & Orchard Management
Widely used for fruit trees, flowers and seedlings, providing precise growth control for commercial orchard and nursery planting systems.
Application Advantages and Market Positioning
Triazole Growth Regulator Differentiated Positioning
Different from pesticides, Paclobutrazol Powder focuses on crop growth regulation, filling market demand for vigor control and flower promotion raw materials.
Dual Functions of Growth Inhibition & Stress Improvement
Restrains overgrowth while enhancing root development and plant stress resistance, bringing differentiated benefits for orchard and grain growers.
Planned Growth Management Positioning
Suitable for precise vigor control during key crop phenological periods, with adjustable regulation effect by dosage.
Wide Adaptability for Field, Nursery and Orchard Crops
Features adjustable regulation effect by dosage, matching the growth management needs of grain fields, commercial nurseries and fruit orchards.
FAQ (Technical Q&A)
Q1: How long does Paclobutrazol remain active in soil, and how does this affect crop rotation?
A: Soil residual activity typically lasts 2 months or longer, and can persist up to 2 years under cool conditions. This long residual means subsequent sensitive crops may be inhibited. Plan crop rotation carefully, and avoid using Paclobutrazol on fields where sensitive crops will follow.
Q2: What is the optimal application timing for fruit trees to control vigor and promote flower buds?
A: Apply during the early stages of new shoot growth, typically in spring or early summer. For flower bud promotion, apply at the onset of flower bud differentiation. Foliar spray is preferred for rapid response; root drench provides longer-lasting control.
Q3: Can Paclobutrazol be used on vegetables?
A: Not recommended for most vegetables. Paclobutrazol has long soil residual activity and can cause excessive growth suppression in subsequent crops. For vegetable seedling vigor control, consider shorter-residual alternatives such as daminozide or chlormequat.
Q4: What are the symptoms of Paclobutrazol overdose, and how can it be mitigated?
A: Overdose causes excessive growth suppression, shortened internodes, and dark green leaves. To mitigate, apply exogenous gibberellin (GA3) to reverse the inhibition. In severe cases, soil remediation or crop rotation may be necessary.
Q5: How does Paclobutrazol compare to other triazole plant growth regulators like uniconazole?
A: Both are triazole growth retardants that inhibit gibberellin biosynthesis. Uniconazole is more active per unit weight and has shorter soil residual activity. Paclobutrazol has longer residual activity and is more commonly used for fruit tree vigor control and ornamental plant height management.
Q6: Can Paclobutrazol be tank-mixed with fungicides or insecticides?
A: It is compatible with most neutral and acidic agrochemicals. Avoid mixing with strongly alkaline pesticides or fertilizers. A small-scale jar test is recommended before large-volume mixing.
Q7: What is the recommended dosage for root drench application on fruit trees?
A: Dosage depends on tree size and species. For fruit trees, typical root drench rates are 0.5–1.5 g of active ingredient per tree, applied in the root zone. Always follow local label recommendations and calibrate by tree size.
Q8: Does Paclobutrazol affect fruit quality?
A: At recommended dosages, Paclobutrazol Powder can improve fruit set and increase yield by redirecting assimilates to reproductive growth. However, overdose may reduce fruit size. Proper dosage and timing are essential for optimal fruit quality.
Q9: What is the difference between Paclobutrazol and Propiconazole?
A: Paclobutrazol is a plant growth regulator designed for vigor control. Propiconazole is a triazole fungicide targeting fungal diseases. Both are triazoles and can inhibit gibberellin biosynthesis in plants, but Propiconazole's primary use is disease control while Paclobutrazol is optimized for growth regulation.
Q10: How should Paclobutrazol be stored to maintain stability?
A: Store in a sealed container in a cool, dry, ventilated warehouse away from heat, direct sunlight, and fire sources. Paclobutrazol is stable for at least 2 years under proper storage conditions. Avoid mixing with alkaline substances.
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