Paclobutrazol 25% SC Plant Growth Regulator

Item	Product Information
Product Name	Paclobutrazol 25% SC
Active Ingredient	Paclobutrazol
Declared Active Content	25%
Formulation	SC, Suspension Concentrate
Product Type	Plant Growth Regulator
Chemical Direction	Triazole PGR
Main Mode of Action	Gibberellin biosynthesis inhibition
Main Plant Response	Reduced cell elongation and shorter internodes
Core Crop Direction	Mango and other registered tropical fruit crops
Supporting Direction	Rice, ornamentals, turf, and other approved crops
Main Commercial Role	Vegetative growth, canopy, and flowering management
Application Route	Soil-directed or foliar, depending on registration
Key Management Factor	Timing, rate, crop physiology, and previous use
Supply Direction	SunAgro branded product for registration, import, and distribution
Document Support	COA, SDS/MSDS, TDS, specification, batch data, and available registration documents

The concentration basis should be confirmed from the official SunAgro specification before converting 25% SC into g/L. If the approved specification declares 25% w/v, it corresponds to 250 g/L. A 25% w/w declaration should not automatically be converted to 250 g/L without density data.

Final crops, application routes, rates, growth stages, PHI, residue requirements, repeated-use restrictions, and environmental precautions must follow the approved destination-market label.

Buyers developing a wider program can review the SunAgro plant growth regulator portfolio when comparing growth promotion, canopy regulation, sprout suppression, and postharvest PGR directions.

What Is Paclobutrazol 25% SC Used For?

Paclobutrazol is primarily used to control excessive vegetative growth.

Depending on registration, its commercial directions may include:

• Mango canopy management
• Mango flowering-management programs
• Vegetative growth regulation in tropical fruit trees
• Internode shortening
• Crop-height regulation
• Rice lodging-management programs
• Ornamental height control
• Turf growth regulation
• Other approved plant-growth management uses

Paclobutrazol should not be treated like GA3, CPPU, or other PGRs designed mainly to stimulate elongation or fruit enlargement.

Its primary physiological direction is:

less excessive elongation → more compact plant architecture

How Does Paclobutrazol Work?

Gibberellin Biosynthesis Inhibition

Paclobutrazol reduces the production of biologically active gibberellins.

Gibberellins are important plant hormones involved in:

• Cell elongation
• Shoot extension
• Internode development
• Plant height
• Vegetative vigor

When gibberellin biosynthesis declines, excessive extension growth is reduced.

Ent-Kaurene Oxidation Pathway

Paclobutrazol acts within the gibberellin biosynthesis pathway, particularly around cytochrome P450-dependent oxidation steps associated with ent-kaurene metabolism.

A simplified sequence is:

Paclobutrazol uptake
→ gibberellin biosynthesis is inhibited
→ active GA levels decline
→ cell elongation decreases
→ internodes shorten
→ excessive shoot extension is reduced
→ canopy architecture becomes more compact

Paclobutrazol should therefore not be described primarily as a cell-division inhibitor.

That would confuse its biological role with PGRs such as Maleic Hydrazide.

Mango Vegetative Growth and Canopy Management

Mango should remain the first commercial crop direction for this product page.

Mango trees can develop strong vegetative flushes under favorable growing conditions. Excessive vegetative growth may create:

• Long shoots
• Dense canopies
• Shading
• Difficult orchard management
• Continued competition between vegetative and reproductive development

Paclobutrazol can be integrated into registered mango programs to suppress excessive vegetative vigor and reduce shoot elongation.

The commercial objective is not simply to make trees smaller.

A good program aims to create a more manageable balance between:

vegetative vigor
and
reproductive crop management

Potential benefits within an appropriate program may include:

• Reduced excessive shoot extension
• Shorter internodes
• More compact canopy development
• Easier orchard canopy management
• Better alignment with flowering-management practices

Response varies with cultivar, tree age, canopy size, soil conditions, climate, and previous Paclobutrazol exposure.

Paclobutrazol in Mango Flowering Programs

Paclobutrazol is widely associated with mango flowering management, but the mechanism should be explained correctly.

It is not a flowering hormone that directly guarantees flower initiation.

The more accurate management logic is:

Excessive vegetative vigor
→ Paclobutrazol suppresses gibberellin biosynthesis
→ shoot growth slows
→ vegetative flushing is reduced
→ the tree may enter a more suitable physiological condition for flowering management

This is why Paclobutrazol can support flowering programs in registered mango-production systems.

Successful flowering still depends on:

• Cultivar
• Tree physiological condition
• Previous crop load
• Climate
• Water management
• Nutrition
• Application timing
• Application rate
• Previous Paclobutrazol treatment

The product should not be promoted as guaranteeing flowering, fruit set, or yield.

Other Tropical Fruit Crop Directions

Depending on local registration, Paclobutrazol 25% SC may also be relevant to tropical or subtropical crops such as:

• Durian
• Calamansi
• Cacao
• Other approved perennial fruit crops

The management objective may differ between crops.

For example, the required degree of vegetative suppression in mango should not automatically be transferred to durian or cacao.

Each crop program should consider:

• Crop architecture
• Tree age
• Root distribution
• Previous treatment history
• Desired growth response
• Local registration

Rice Height and Lodging Management

Paclobutrazol may also be used in registered rice programs to regulate plant architecture.

Potential objectives include:

• Reduced excessive plant height
• Shorter internodes
• Improved stem architecture
• Reduced lodging pressure

However, rice response is highly sensitive to application timing and concentration.

Treatment that is too early or too strong may interfere with reproductive development or yield formation.

The correct commercial positioning is therefore:

Paclobutrazol may support lodging-management programs where variety, crop stage, concentration, and local registration are appropriate.

It should not be marketed as a universal rice yield enhancer.

Ornamental and Turf Growth Control

Paclobutrazol may also fit registered ornamental and turf programs where excessive shoot or vertical growth requires management.

Potential objectives include:

• More compact ornamental plants
• Reduced shoot elongation
• Height management
• Reduced trimming requirements
• Controlled turf growth

The desired response in ornamentals is different from mango flowering management, so application rates and methods must remain crop-specific.

Soil Application vs Foliar Application

Application route can materially change Paclobutrazol performance.

Soil-Directed Programs

Soil-directed applications are particularly relevant to some perennial fruit-tree systems.

Important considerations include:

• Tree size
• Root distribution
• Soil texture
• Soil moisture
• Irrigation
• Previous Paclobutrazol use
• Application placement
• Local environmental restrictions

The objective is to allow uptake through active roots.

A soil-use rate from one mango production region should not be transferred automatically to another.

Foliar Programs

Foliar application may be used in selected registered crops such as:

• Rice
• Ornamentals
• Other approved crops

Performance depends on:

• Crop stage
• Leaf area
• Spray coverage
• Concentration
• Environmental conditions

The product page should not present soil and foliar application as interchangeable.

Why Application Timing and Rate Matter

Paclobutrazol is a response-sensitive PGR.

The same active ingredient can produce very different crop responses depending on timing and dose.

Application Too Early

An overly early or excessive treatment may result in:

• Excessive dwarfing
• Unwanted restriction of vegetative development
• Reduced reproductive development
• Delayed crop recovery
• Unwanted yield effects

Appropriate Application Window

Correct treatment should match:

• Crop physiology
• Target growth stage
• Desired canopy response
• Variety
• Previous treatment history
• Local label requirements

Application Too Late

A late application may provide insufficient control because the target vegetative growth has already occurred.

SunAgro does not recommend one global Paclobutrazol rate or mango application timing.

Soil Persistence and Carryover Considerations

Paclobutrazol soil behavior is particularly important in perennial crop markets.

Soil persistence can vary substantially according to:

• Soil texture
• Organic matter
• Moisture
• Temperature
• Microbial activity
• Application rate
• Previous application history
• Climate

Repeated soil applications should therefore consider previous-season use.

Potential concerns from excessive accumulation may include:

• Over-suppression of vegetative growth
• Extended crop response
• Effects on sensitive rotational crops
• Difficulty correcting over-application

The product should not be marketed as having either a fixed global persistence period or no carryover risk.

For orchard buyers, previous Paclobutrazol history is an important part of product selection and application planning.

What Paclobutrazol Does Not Guarantee

Paclobutrazol can influence crop physiology, but it does not independently guarantee:

• Flowering
• Fruit set
• Higher yield
• Larger fruit
• Better fruit color
• Stress tolerance
• Uniform response across cultivars

Successful crop management still depends on:

• Nutrition
• Irrigation
• Pruning
• Crop load
• Temperature
• Rainfall
• Variety
• Orchard condition
• Other PGR practices

This boundary is particularly important in mango markets, where flowering response is frequently influenced by multiple environmental and physiological factors.

SC Formulation Features

SC means Suspension Concentrate.

In an SC formulation, finely divided solid active ingredient particles are dispersed in a liquid phase.

The active ingredient is not necessarily fully dissolved.

After dilution, the suspension must remain sufficiently uniform for consistent application.

Why SC Fits Paclobutrazol Markets

Potential commercial advantages include:

• Liquid measurement
• Convenient dilution
• Familiar agricultural handling
• Flexible package sizes
• Suitable use in tropical-market distribution channels
• Consistent active delivery when properly formulated

Formulation quality remains critical.

Paclobutrazol 25% SC Quality Parameters

Quality Parameter	Procurement Value
Paclobutrazol Content	Confirms declared concentration
Concentration Basis	Confirms w/w or w/v expression
Density	Supports concentration and filling verification
Appearance	Detects settling or phase changes
Particle Size	Supports suspension performance
Suspensibility	Supports uniform active distribution
Wet Sieve	Detects oversized particles
Redispersibility	Important after storage
Viscosity	Supports filling and application handling
Pourability	Supports container emptying
Persistent Foam	Supports tank preparation
pH	Supports formulation stability
Low-Temperature Stability	Checks thickening or crystallisation
High-Temperature Stability	Important for tropical markets
Accelerated Storage Stability	Supports shelf-life evaluation
Packaging Compatibility	Supports long-term liquid storage

High-temperature stability is particularly relevant for distribution into tropical fruit markets.

Product Advantages

Paclobutrazol 25% SC has a clear role within professional PGR portfolios.

Its main advantages include:

• Triazole plant growth regulator
• Gibberellin biosynthesis inhibition
• Reduced excessive vegetative growth
• Shorter internodes
• Mango canopy-management relevance
• Flowering-management support
• Tropical fruit market positioning
• Crop-height regulation
• Rice lodging-management direction where registered
• Practical SC formulation
• SunAgro registration and distribution support

The product should not be described as a guaranteed flowering, yield, or fruit-size enhancer.

Paclobutrazol 25% SC vs 23% SC

Both concentrations are commercially established in different markets.

Dimension	Paclobutrazol 25% SC	Paclobutrazol 23% SC
Active Ingredient	Paclobutrazol	Paclobutrazol
Formulation	SC	SC
Main Difference	Concentration and registration specification	Concentration and registration specification
Mode of Action	GA biosynthesis inhibition	GA biosynthesis inhibition
Inherent Efficacy Superiority	Cannot be assumed	Cannot be assumed
Market Selection	Registration dependent	Registration dependent

A higher formulation concentration does not automatically mean better field performance.

Professional comparison should be based on:

• Registered active rate
• Crop use
• Application method
• Local label
• Formulation quality

Paclobutrazol vs Prohexadione-Calcium

Both products can regulate excessive vegetative growth, but their commercial positioning is different.

Dimension	Paclobutrazol	Prohexadione-Calcium
Main Direction	GA biosynthesis inhibition	GA-related growth regulation
Core Market Position	Mango and tropical fruit management	Orchard shoot-growth management
Mango Flowering Position	Important	Not the core direction
Soil-Directed Use	Important in some programs	Different application profile
Persistence Consideration	Important	Different environmental profile
Main Portfolio Role	Strong vegetative suppression	Controlled shoot-growth management

SunAgro also offers an orchard shoot-growth control PGR for buyers developing alternative canopy-management programs.

The two products should not be treated as direct substitutes without considering crop, timing, persistence, and registration.

Paclobutrazol vs Maleic Hydrazide

Dimension	Paclobutrazol	Maleic Hydrazide
Main Mechanism	GA biosynthesis inhibition	Cell division suppression
Main Objective	Vegetative growth regulation	Sprout suppression
Core Crops	Mango, fruit trees, selected rice programs	Potato, onion
Flowering Management	Important market direction	Not core
Storage Program	Not core	Core
Main Portfolio Role	Canopy and flowering management	Pre-harvest sprout management

These products occupy different positions within a professional PGR portfolio.

Registration, Residue, and Market Fit

Paclobutrazol remains a commercially relevant active ingredient in multiple mango, tropical-fruit, rice, ornamental, and other registered PGR markets.

Before developing a project, buyers should confirm:

• Active ingredient approval
• Exact 25% SC registration
• Concentration basis
• Approved crops
• Application route
• Maximum applications
• PHI
• MRL requirements
• Soil-use restrictions
• Rotational-crop restrictions
• Environmental precautions
• Technical-source requirements

Plant-growth regulator registration should be treated separately from fungicide registration even though Paclobutrazol belongs chemically to the triazole family.

The product should only be marketed for the PGR uses authorized in the destination market.

Crop Safety and Use Boundaries

Paclobutrazol crop response can be strong and persistent.

Important factors include:

• Variety
• Crop stage
• Plant age
• Tree size
• Root distribution
• Soil type
• Application route
• Rate
• Previous use
• Climate
• Crop stress

Do not automatically transfer a recommendation between:

• Mango and durian
• Young and mature orchards
• Soil and foliar application
• Fruit trees and rice
• One production region and another

Over-application may produce excessive growth suppression that cannot be quickly corrected.

Storage and Transport

Store Paclobutrazol 25% SC in its original sealed container.

Recommended controls include:

• Keep it in a cool and ventilated warehouse.
• Protect it from direct sunlight.
• Avoid excessive heat.
• Protect it from freezing where required.
• Store containers upright.
• Prevent leakage.
• Keep it away from food, feed, seed, and water.
• Maintain batch identification.
• Inspect containers after transport.
• Follow local pesticide transport requirements.

Before distribution, inspect where required for:

• Settling
• Thickening
• Phase separation
• Crystallisation
• Redispersibility
• Pourability
• Seal integrity
• Leakage

Registration, Document, and Supply Support from SunAgro

SunAgro supplies branded plant growth regulators for qualified importers, distributors, registration companies, agricultural wholesalers, and local crop-protection partners.

For Paclobutrazol 25% SC projects, available support may include:

• Product specification
• Certificate of Analysis
• SDS or MSDS
• Technical Data Sheet
• Paclobutrazol technical information
• Concentration-basis information
• SC formulation information
• Density data
• Particle-size data
• Suspensibility data
• Redispersibility data
• Viscosity data
• Storage-stability information
• Packaging information
• Samples
• Available registration-related documents
• Export-document coordination
• Long-term supply planning

Document availability depends on the destination country, target crops, application route, cooperation stage, and registration pathway.

Qualified partners can discuss PGR registration cooperation based on their mango, tropical-fruit, rice, ornamental, or other growth-management markets.

Stable Supply and SC Quality Control

Reliable Paclobutrazol 25% SC production requires control of the active ingredient, particle characteristics, suspension behavior, viscosity, storage stability, and packaging compatibility.

Raw Material Control

Incoming materials may be checked for:

• Paclobutrazol identity
• Active ingredient purity
• Relevant impurities
• Dispersants
• Wetting agents
• Suspension aids
• Antifoam components
• Other formulation materials

SC Production

Production controls may include:

• Raw-material weighing
• Milling
• Particle-size reduction
• Dispersion
• Homogenization
• Density
• Viscosity
• Temperature control

Batch Quality Inspection

Relevant tests may include:

• Paclobutrazol content
• Appearance
• Density
• pH
• Particle size
• Suspensibility
• Wet sieve
• Redispersibility
• Pourability
• Persistent foam
• Viscosity
• Low-temperature stability
• High-temperature stability
• Accelerated storage stability

Packaging and Shipment

Packaging checks may include:

• Container compatibility
• Seal integrity
• Leakage
• Pack volume
• Batch coding
• Label accuracy
• Carton strength
• Tropical-market transport suitability

Stable supply means consistent active content, reliable SC suspension performance, controlled storage stability, consistent documentation, and coordinated export planning.

Frequently Asked Questions

What is Paclobutrazol 25% SC?

It is a triazole plant growth regulator used for registered vegetative-growth control, canopy management, flowering-management support, and crop-height regulation.

Is 25% SC the same as 250 g/L?

Not automatically. If the official specification declares 25% w/v, it corresponds to 250 g/L. A 25% w/w product requires density data before conversion.

What type of PGR is Paclobutrazol?

Paclobutrazol is primarily a gibberellin-biosynthesis inhibitor used to suppress excessive vegetative growth.

Is Paclobutrazol a triazole?

Yes. Paclobutrazol is chemically a triazole, but this product is positioned as a plant growth regulator rather than a triazole fungicide.

How does Paclobutrazol inhibit plant growth?

It reduces gibberellin biosynthesis, decreasing excessive cell elongation and shortening internodes.

Does Paclobutrazol reduce internode length?

Yes. Reduced internode elongation is an important physiological response where the product is used correctly.

Is Paclobutrazol systemic?

Paclobutrazol can be absorbed by plants through registered application routes, including root or foliar uptake depending on the use pattern.

What is Paclobutrazol mainly used for?

Its strongest commercial directions include mango vegetative-growth control, flowering-management programs, tropical-fruit canopy regulation, and selected crop-height applications.

Can Paclobutrazol be used on mango?

Yes, where the exact product and application method are registered for mango.

Does Paclobutrazol directly induce mango flowering?

It is better described as supporting flowering management by suppressing excessive vegetative growth and modifying the crop’s growth balance. Flowering is not guaranteed.

Can Paclobutrazol be used on durian?

It may be used where the exact formulation and use pattern are registered for durian.

Can it be used on rice?

Paclobutrazol may be used in approved rice height or lodging-management programs.

Does Paclobutrazol reduce lodging?

It may support lodging-management programs by modifying plant height and internode structure, depending on variety, timing, rate, and registration.

Can Paclobutrazol be applied to soil?

Yes, soil-directed application is important in some registered perennial fruit-tree programs.

Can Paclobutrazol be applied as a foliar spray?

Yes, in crops and programs where foliar application is specifically registered.

Why does previous soil application matter?

Paclobutrazol may persist in soil, so previous orchard use can influence subsequent crop response and should be reviewed before repeated treatment.

Is Paclobutrazol 25% SC better than 23% SC?

Not automatically. The correct choice depends on registered active rate, formulation quality, crop program, and market registration.

What is the difference between Paclobutrazol and Prohexadione-Calcium?

Both regulate vegetative growth, but Paclobutrazol has a strong mango and tropical-fruit position and may involve soil-directed use and persistence considerations. Prohexadione-Calcium has a different orchard-growth management profile.

What is the difference between Paclobutrazol and Maleic Hydrazide?

Paclobutrazol mainly inhibits gibberellin biosynthesis and controls vegetative growth. Maleic Hydrazide mainly suppresses cell division and is commonly positioned for pre-harvest sprout management.

What documents can SunAgro provide?

Depending on the project, SunAgro may provide COA, SDS/MSDS, TDS, product specifications, SC quality data, samples, packaging information, batch records, and available registration-related documents.

Request Paclobutrazol 25% SC Product Details

Paclobutrazol 25% SC is suitable for qualified companies developing professional vegetative-growth, mango flowering-management, tropical-fruit, rice lodging, ornamental, and other registered PGR programs.

To evaluate the product, please provide:

• Target country
• Company type
• Registration status
• Required concentration basis
• Target crop
• Mango or tropical-fruit market
• Tree age or orchard type
• Target vegetative-growth response
• Flowering-management objective
• Soil or foliar application route
• Previous Paclobutrazol use
• Soil and carryover considerations
• MRL or residue requirements
• Required pack size
• Expected annual volume
• Required technical documents
• Planned distribution channel

Request the product specification to review whether SunAgro Paclobutrazol 25% SC fits your registration pathway, crop-growth objective, mango or tropical-fruit program, SC quality requirements, and long-term distribution plan.