Thidiazuron 360 g/L + Diuron 180 g/L SC Cotton Defoliant

Product Attribute	Specification
Product Name	Thidiazuron 360 g/L + Diuron 180 g/L SC
Active Ingredient 1	Thidiazuron
Thidiazuron Content	360 g/L
Active Ingredient 2	Diuron
Diuron Content	180 g/L
Total Active Ingredient Content	540 g/L
Active Ingredient Ratio	2:1
Formulation	SC — Suspension Concentrate
Product Type	Cotton defoliant / pre-harvest harvest aid
Main Crop	Cotton
Primary Functions	Leaf defoliation and regrowth suppression
Application Window	Mature cotton before harvest
Application Method	Ground application; aerial application only where registered
Typical Market Positioning	Mechanized cotton-production and harvest programs
Standard MOQ	Normally 1,000 L
Available Documents	COA, SDS, TDS, product specification and available registration-supporting information
Packaging Support	Bottles, larger containers, labels, cartons and export packing
Supply Type	Bulk B2B supply for import, registration and distribution

Exact application rates, cotton maturity requirements, harvest intervals, treatment numbers and application methods must follow the approved product label in the destination market.

What Is Thidiazuron + Diuron Cotton Defoliant?

Thidiazuron 360 g/L + Diuron 180 g/L SC is a concentrated cotton harvest-aid product used before picking.

Its purpose is to help remove mature cotton leaves from the plant so that the crop canopy becomes more suitable for harvesting.

The product may support:

• More uniform leaf drop
• Reduced green leaf material
• Suppression of terminal regrowth
• Better access for mechanical pickers
• Lower leaf contamination pressure
• More predictable harvest preparation
• Reduced need to transport larger volumes of formulated product

This product should not be confused with a conventional cotton weed-control herbicide.

Although Diuron is also used as a herbicide active ingredient in other products, its role in this formulation is to support the cotton defoliation process. The final product is designed for mature cotton plants, not for controlling weeds between cotton rows.

It should also not be described as a stand-alone boll-opening product. Its main role is defoliation and regrowth management.

For a wider view of crop-input and harvest programs, buyers can review our cotton crop protection and harvest solutions.

How Does Thidiazuron + Diuron Work?

The two active ingredients support cotton defoliation through complementary biological effects.

Thidiazuron Promotes Physiological Leaf Abscission

Thidiazuron is the main physiological defoliation component in the formulation.

After application to mature cotton, it changes the plant’s hormonal balance around the leaf petiole. This supports the formation of a natural separation zone, known as the abscission layer.

As this layer develops:

• Nutrient movement into the leaf decreases
• The leaf begins to senesce
• The connection between the leaf and stem weakens
• The leaf separates from the plant

This is different from simply burning or drying the leaf surface.

The objective is controlled leaf separation rather than rapid tissue destruction.

Thidiazuron also helps suppress new vegetative growth at the top of the plant. This can reduce the development of fresh leaves after the initial defoliation treatment.

Diuron Supports Leaf Yellowing and Controlled Dry-Down

Diuron inhibits photosystem II in green leaf tissue.

Within this cotton defoliant formulation, it adds controlled photosynthetic stress that supports:

• Leaf yellowing
• Chlorophyll decline
• Tissue senescence
• Reduced leaf activity
• More complete defoliation response

Diuron is not included to control field weeds in this use pattern.

Its role is to strengthen and accelerate the response initiated by Thidiazuron.

Combined Defoliation Effect

The technical logic of the premix is:

Thidiazuron promotes natural leaf separation → Diuron increases physiological stress in the leaf → mature leaves yellow, decline and drop → the cotton canopy becomes more suitable for harvest

The field objective is not maximum leaf burning.

Excessively rapid tissue desiccation can cause leaves to dry while still attached to the plant. This is sometimes described as leaf sticking and may increase leaf trash during mechanical picking.

A successful program should balance:

• Leaf yellowing
• Abscission
• Controlled dry-down
• Regrowth suppression
• Harvest timing
• Cotton lint protection

Main Benefits in Cotton Harvest Programs

More Uniform Leaf Drop

Uniform defoliation allows more of the cotton canopy to reach a harvest-ready condition at the same time.

This can reduce the presence of green leaves in the upper, middle and lower parts of the plant.

Uniformity still depends on:

• Cotton maturity
• Canopy density
• Spray coverage
• Weather
• Application rate
• Crop stress
• Variety
• Field uniformity

Reduced Green Leaf Material

Green leaves may stain cotton lint or increase unwanted plant material during picking and ginning.

Reducing green leaf tissue can support cleaner harvest conditions, but the product should not be presented as guaranteeing a particular lint grade.

Final cotton quality also depends on:

• Variety
• Boll maturity
• Weather
• Picker settings
• Harvest timing
• Storage
• Ginning practices

Regrowth Suppression

Late-season cotton may continue producing new leaves and shoots, particularly under warm conditions or after irrigation.

Thidiazuron helps suppress this regrowth, supporting a more stable harvest window.

Regrowth suppression is especially relevant in:

• Long-season cotton areas
• Irrigated production
• Rank cotton
• Fields with high nitrogen availability
• Warm autumn conditions
• Delayed harvest programs

Better Preparation for Mechanical Picking

Leaf removal improves access to open cotton bolls.

A more open canopy may support:

• Improved picker access
• Reduced green leaf contact
• More consistent machine operation
• Lower plant-material intake
• Better coordination of large harvest areas

Mechanical harvest performance still depends on machine calibration, crop condition and harvest timing.

When Should the Product Be Applied?

Application timing is the most important decision in a cotton defoliation program.

The product should only be applied after the crop and harvestable bolls have reached adequate maturity.

Assess Cotton Boll Maturity First

Do not base the treatment decision only on the amount of green leaf material.

Before application, assess:

• The maturity of the uppermost harvestable bolls
• Boll firmness
• Resistance to compression
• Resistance to cutting
• Seed development
• Cotton-fiber development
• Percentage of open bolls
• Expected harvest date

Local extension guidance and the registered product label should define the accepted maturity test.

A green boll may look large but still be physiologically immature.

Applying too early can interrupt normal boll and seed development.

Suitable Application Window

The treatment window should align with:

• Adequate boll maturity
• A confirmed harvest plan
• Suitable temperature
• Acceptable humidity
• Limited rainfall risk
• Sufficient time before picking
• Local pre-harvest interval requirements

Defoliation should be planned backward from the expected harvest date.

The required number of days between application and picking varies with:

• Temperature
• Variety
• Crop condition
• Application rate
• Product label
• Weather after treatment

Risks of Applying Too Early

Premature application may cause:

• Reduced boll weight
• Incomplete seed maturity
• Lower fiber development
• Interrupted boll filling
• Yield loss
• Excessive stress on immature plants
• Reduced response from upper bolls
• Unacceptable crop injury

Thidiazuron + Diuron should not be used to force an immature crop into harvest.

Risks of Applying Too Late

Late application may result in:

• Insufficient time for leaf drop
• Green leaves remaining at picking
• Harvest delays
• Higher leaf trash
• Increased exposure to low temperatures
• Rain interrupting the harvest window
• The need for an additional treatment
• Reduced value from regrowth suppression

The best timing balances boll maturity with the expected weather and mechanical-harvest schedule.

Weather and Crop Conditions

Cotton defoliation is a physiological process. Weather and plant condition can strongly influence the response.

Field Condition	Expected Influence
Warm Day and Night Temperatures	Generally support faster physiological activity and leaf drop
Higher Relative Humidity	Often supports a more active defoliation response
Healthy, Turgid Leaves	Usually respond more predictably
Low Night Temperatures	May slow leaf yellowing, abscission and regrowth suppression
Drought-Stressed Cotton	May absorb and respond to the treatment less effectively
Rank or Dense Cotton	Requires stronger canopy penetration and coverage
Very Waxy Leaves	May reduce spray retention and uptake
Excessively Hot Conditions	May increase the risk of rapid desiccation or crop stress
Rain Soon After Treatment	May reduce spray retention according to the label’s rainfastness requirement
Strong Wind	Increases drift risk and reduces coverage uniformity

Low-Temperature Conditions

Cool weather slows cotton metabolism and the development of the leaf-abscission layer.

Possible results include:

• Slower yellowing
• Delayed leaf drop
• Less regrowth suppression
• Uneven canopy response
• Longer time before harvest

Do not assume that increasing the rate will completely overcome unsuitable weather.

Drought-Stressed Cotton

Leaves on drought-stressed cotton may be:

• Less physiologically active
• More waxy
• Less receptive to foliar treatment
• More likely to dry rather than detach properly

Where the label and harvest plan permit, cotton should be in a suitable physiological condition before treatment.

Rank Cotton

Dense, actively growing cotton can be difficult to cover.

A rank canopy may require:

• Higher approved water volume
• Suitable nozzles
• Better canopy penetration
• Careful ground speed
• Attention to lower leaves
• Strong agitation
• Accurate rate control

Application Guidance

The following information describes general professional application principles and does not replace the approved product label.

1. Confirm Boll Maturity

Assess boll and seed maturity before scheduling the treatment.

Do not rely only on:

• Calendar date
• Percentage of open bolls
• Leaf color
• Customer harvest pressure

The top harvestable bolls must be sufficiently mature.

2. Review the Weather Window

Check the forecast for:

• Day and night temperatures
• Rain
• Wind
• Humidity
• Frost risk
• Expected picking conditions

Select a treatment period that provides enough time for the crop to respond before harvest.

3. Inspect the Cotton Canopy

Evaluate:

• Plant height
• Canopy density
• Leaf condition
• Regrowth
• Drought stress
• Disease pressure
• Insect damage
• Boll distribution
• Field uniformity

Uneven fields may not be ready for one uniform application date.

4. Calibrate Application Equipment

Before treatment, confirm:

• Nozzle condition
• Spray pressure
• Water volume
• Ground speed
• Boom height
• Spray pattern
• Tank agitation
• Flow rate
• Field-area calculation

A high-concentration formulation requires accurate measurement.

Small metering errors may create a larger difference in the delivered active ingredient than with a lower-concentration product.

5. Achieve Full Canopy Coverage

Spray should reach:

• Upper leaves
• Middle canopy
• Lower leaves
• Inner plant surfaces
• Regrowth areas
• Dense sections of the field

Poor lower-canopy coverage can result in green leaves remaining near the open bolls.

6. Avoid Overlap

Spray overlap may cause:

• Excessive leaf desiccation
• Leaf sticking
• Crop injury
• Increased drift
• Uneven harvest preparation
• Unnecessary residue

Pay particular attention near:

• Field edges
• Turning areas
• Obstacles
• Irregular boundaries
• Previously treated strips

7. Maintain Agitation

Thidiazuron 360 g/L + Diuron 180 g/L SC contains suspended active ingredient particles.

Agitation should continue:

• During tank filling
• While adding the product
• During transport to the field
• Throughout application
• After operational interruptions

8. Follow the Approved Product Rate

Do not estimate the rate by converting directly from a lower-concentration formulation.

Although 360 + 180 SC contains three times the total active ingredient concentration of 120 + 60 SC, the registered rate must be taken from the exact high-concentration product label.

Ground vs Aerial Application

Aerial application should only be discussed where the destination-market label permits it.

Comparison Factor	Ground Application	Aerial Application
Coverage Potential	Higher water volume and stronger canopy penetration	Depends on flight conditions and droplet management
Field Capacity	Moderate	High
Drift Risk	Lower when properly managed	Requires stricter drift management
Water Volume	Normally higher	Normally lower
Lower-Canopy Coverage	Easier to improve with correct equipment	More challenging in dense cotton
Large-Field Efficiency	Suitable for accessible fields	Suitable for large or difficult fields where registered
Regulatory Requirements	Product-label specific	Strictly product-label specific

Ground Application

Ground equipment can provide better control over:

• Spray volume
• Boom height
• Nozzle selection
• Droplet size
• Canopy penetration
• Field boundaries

However, tall or rank cotton may reduce ground-equipment access.

Aerial Application

Aerial application can improve operational speed across large cotton areas.

It also requires careful control of:

• Wind speed
• Temperature inversions
• Flight height
• Droplet size
• Sensitive neighboring crops
• Water volume
• Canopy density
• Buffer areas

A product registered only for ground application must not be promoted for aerial use.

Is Thidiazuron + Diuron a Boll Opener?

No. This formulation is primarily a cotton defoliant and regrowth-suppression product.

Its main functions are:

• Promoting leaf drop
• Reducing green leaf material
• Suppressing new vegetative growth
• Preparing mature cotton for harvest

It is not a dedicated boll opener.

Ethephon is commonly used in products designed to promote cotton boll opening and crop maturation.

Where the approved local label permits, a cotton defoliant and an Ethephon boll opener may be integrated into the same harvest program.

The decision depends on:

• Boll maturity
• Percentage of open bolls
• Weather
• Harvest date
• Product-label instructions
• Tank-mix compatibility
• Crop condition

An immature boll should not be forced into opening simply to accelerate the harvest schedule.

Thidiazuron 360 + Diuron 180 vs 120 + 60 SC

Both products contain Thidiazuron and Diuron at a 2:1 ratio, but they are separate commercial formulations.

Comparison Factor	360 g/L + 180 g/L SC	120 g/L + 60 g/L SC
Total Active Ingredient Content	540 g/L	180 g/L
Active Ingredient Ratio	2:1	2:1
Concentration Positioning	High concentration	Standard concentration
Formulated Product Volume	Lower at an equivalent approved active dose	Higher
Metering Sensitivity	Higher	Lower
Storage and Freight Volume	Lower	Higher
Container Requirement	Fewer containers for the same approved active dose	More containers
SC Stability Requirement	More technically demanding	Moderate
Target Channel	Large-scale and high-concentration cotton markets	Standard distributor and retail channels
Application Rate	Product-specific	Product-specific
Registration	Separate registration	Separate registration

The high-concentration product may provide logistical advantages, but it is not automatically more effective in the field.

Field performance depends on:

• The approved active ingredient dose
• Boll maturity
• Weather
• Coverage
• Application timing
• Cotton condition
• Equipment calibration

Buyers requiring a conventional commercial concentration can review our standard-concentration cotton defoliant.

High-Concentration SC Formulation Features

SC means Suspension Concentrate.

In this formulation, fine particles of Thidiazuron and Diuron are dispersed in a liquid carrier.

Because the total active ingredient loading is high, physical formulation control is especially important.

Key Quality Parameters

Quality Parameter	Buyer Relevance
Thidiazuron Content	Confirms the declared 360 g/L concentration
Diuron Content	Confirms the declared 180 g/L concentration
Suspension Stability	Helps prevent uneven active ingredient distribution
Redispersibility	Confirms the formulation can return to a uniform state after storage
Particle Size Distribution	Influences storage, sprayability and crop coverage
Wet Sieve Residue	Helps reduce nozzle blockage risk
Viscosity	Influences pouring, pumping and filling
pH	Supports formulation and storage stability
Persistent Foam	Affects mixing and spray-tank operation
Pourability	Important for accurate handling and low container residue
Low-Temperature Stability	Important for cold-market storage and transport
Heat Stability	Important for warm climates and container shipping
Packaging Compatibility	Reduces leakage, deformation and seal failure

Suspension Stability

High active loading increases the need for effective dispersants, wetting agents and rheology control.

Poor suspension stability may result in:

• Hard sediment
• Uneven concentration
• Difficult redispersion
• Nozzle blockage
• Inaccurate application
• Product remaining in the container
• Inconsistent performance between the beginning and end of the tank

Redispersibility

Some settling can occur during storage.

The product should return to a uniform suspension after the approved shaking or agitation procedure.

Hard sediment that cannot be redispersed may indicate an unacceptable storage or formulation problem.

Packaging Compatibility

Bottle, cap, seal and label systems should be tested against the high-concentration SC formulation.

Packaging assessment should include:

• Leakage
• Cap security
• Induction-seal performance
• Bottle deformation
• Label adhesion
• Product residue around the closure
• Pouring behavior
• Long-term storage
• High-temperature transport
• Freeze-thaw exposure where relevant

Mixing and Continuous Agitation

Correct mixing is necessary to deliver a uniform concentration across the treated field.

General Mixing Procedure

Where permitted by the product label:

1. Inspect and clean the spray tank.
2. Fill the tank partly with clean water.
3. Start agitation.
4. Shake or circulate the product container where required.
5. Measure the required amount accurately.
6. Add the product slowly to the agitated water.
7. Add approved tank-mix partners in the correct order.
8. Complete filling with water.
9. Maintain continuous agitation.
10. Apply the mixture within the approved period.

Do Not Allow the Spray Mixture to Stand

If the spray mixture remains stationary:

• Suspended particles may settle
• Active ingredients may become unevenly distributed
• Early and late tank applications may deliver different doses
• Deposits may form in lines and nozzles
• Tank cleaning may become more difficult

Re-agitate the spray mixture fully after any operational interruption.

Prepare Only the Required Volume

Avoid storing diluted product in the spray tank overnight unless the label specifically permits it.

Prepare only the quantity required for the scheduled treatment area.

Spray Equipment Cleaning

Spray equipment should be cleaned immediately after application.

Residues that dry inside:

• Tanks
• Pumps
• Hoses
• Filters
• Nozzles
• Boom sections

may become difficult to remove.

Thidiazuron residues may affect sensitive crops treated later with the same equipment.

General Cleaning Principles

• Drain the tank fully.
• Rinse the tank with clean water.
• Circulate the rinse water through lines and nozzles.
• Clean filters and screens separately.
• Use the label-approved cleaning procedure.
• Repeat rinsing where required.
• Dispose of rinsate according to local regulations.
• Do not release wash water into irrigation canals or surface water.

Do not rely only on draining the tank.

A small remaining volume may still contain enough product to affect a sensitive crop.

Tank Mixing and Harvest Program Integration

The product may be integrated with other approved cotton harvest aids where the local label supports the program.

Potential partners may include:

• Ethephon-based boll openers
• Other registered cotton defoliants
• Approved adjuvants
• Crop oils where permitted
• Locally registered desiccants

Questions to Confirm Before Tank Mixing

• Are both products registered for the same cotton stage?
• Are the bolls sufficiently mature?
• Is the mixture physically compatible?
• Is the crop already under heat or drought stress?
• Could the combination dry the leaves too quickly?
• Is there a risk of leaf sticking?
• What is the required pre-harvest interval?
• Which label has the most restrictive instruction?

Excessive Desiccation Risk

A highly aggressive mixture under hot, dry conditions may cause leaves to dry before the abscission layer fully develops.

This can result in:

• Dry leaves remaining attached
• Increased leaf trash
• Reduced harvest cleanliness
• Uneven canopy preparation

The objective is controlled leaf drop, not maximum tissue burn.

Drift and Sensitive Crop Protection

Thidiazuron-containing spray must be kept away from non-target crops and vegetation.

Drift may affect the growth of sensitive plants.

Particular care may be required near:

• Vegetables
• Grapes
• Citrus
• Orchards
• Ornamentals
• Nurseries
• Young crops
• Leafy vegetables
• Residential gardens
• Natural vegetation

Drift-Management Measures

• Follow label wind-speed limits.
• Avoid temperature inversions.
• Use suitable droplet sizes.
• Maintain the correct boom or flight height.
• Keep required buffer zones.
• Shut off spray near field boundaries.
• Avoid spraying toward sensitive crops.
• Monitor weather throughout application.
• Do not apply when wind direction is unstable.

Temperature Inversions

A temperature inversion can trap fine droplets above the field and allow them to move away from the intended treatment area.

Do not apply during an inversion where prohibited by the label.

Common signs may include:

• Ground fog
• Smoke moving horizontally
• Very calm air
• Dust remaining suspended
• Cooler air near the soil surface

Label and Registration Requirements

There is no single global label for Thidiazuron 360 g/L + Diuron 180 g/L SC.

Every commercial label must match the exact:

• Active ingredient contents
• SC formulation
• Registration holder
• Manufacturer
• Destination country
• Cotton maturity criteria
• Application rate
• Water volume
• Application method
• Weather restrictions
• Pre-harvest interval
• Maximum treatment number
• Tank-mix instructions
• Drift requirements
• Rotational-crop restrictions
• Packaging size

The 360 + 180 SC product cannot use the label of the 120 + 60 SC formulation.

The active ingredient ratio may be the same, but the concentration, product rate, physical specification and registration identity are different.

Information Required for Label Review

Importers and registration partners should provide:

• Destination country
• Cotton-production region
• Required package size
• Ground or aerial application requirement
• Label language
• Current registration status
• Typical harvest window
• Expected annual volume
• Required technical documents
• Proposed tank-mix partners

The bottle, carton, COA, SDS, TDS and registration documents must contain consistent product information.

Safety and Operator Protection

The product must be handled according to the final SDS and approved label.

General Safety Requirements

• Wear the required protective clothing.
• Use chemical-resistant gloves where specified.
• Protect the eyes and face during mixing.
• Avoid skin contact.
• Do not inhale spray mist.
• Do not eat, drink or smoke during handling.
• Wash hands and exposed skin after use.
• Remove contaminated clothing.
• Keep unauthorized people away from treated areas.
• Follow the approved re-entry interval.
• Do not reuse empty pesticide containers.

The final hazard classification depends on the complete formulation, not only on the active ingredient names.

Environmental Precautions

Prevent contamination of:

• Rivers
• Lakes
• Streams
• Wells
• Irrigation canals
• Drainage systems
• Fish ponds
• Non-target vegetation

Runoff Management

Do not apply when:

• Soil is saturated
• Heavy rain is expected
• Water is flowing through the field
• Drainage channels cannot be protected
• Spray could enter surface water
• Buffer-zone requirements cannot be maintained

Non-Target Plant Protection

Thidiazuron can affect plant growth and leaf retention.

Avoid drift or runoff onto neighboring crops and natural vegetation.

Container and Waste Disposal

• Follow local container-rinsing requirements.
• Do not reuse empty containers.
• Prevent rinsate from entering water.
• Dispose of unused product according to local regulations.
• Use approved pesticide-container collection programs where available.

Storage and Transport

Store Thidiazuron 360 g/L + Diuron 180 g/L SC:

• In its original sealed packaging
• In a cool, dry and ventilated warehouse
• Away from direct sunlight
• Away from excessive heat
• Away from freezing conditions where relevant
• Away from food and animal feed
• Away from incompatible chemicals
• In a secure pesticide-storage area
• Under conditions stated in the SDS

Before Shipment

Inspect:

• Container condition
• Cap security
• Induction seal
• Leakage
• Label adhesion
• Batch coding
• Fill volume
• Carton strength
• Shipping marks
• Pallet condition

Transport classification must be confirmed according to the final formulation, packaging size, SDS, shipping route and destination-country requirements.

Packaging, Quality Control and Documentation Support

POMAIS supplies Thidiazuron 360 g/L + Diuron 180 g/L SC for bulk import, registration and distribution projects.

Packaging Options

Commercial packaging discussions may include:

• 1 L bottles
• 5 L containers
• 10 L containers
• 20 L containers
• Larger drums where commercially and technically suitable
• Induction seals
• Tamper-evident closures
• Multilingual labels
• Retail cartons
• Master cartons
• Batch and expiry coding
• Shipping marks
• Pallet and container planning

Final packaging depends on:

• Order quantity
• Formulation compatibility
• Registration requirements
• Transport conditions
• Target-market preference
• Filling-line feasibility

Product Quality Control

Quality-control checks may include:

• Thidiazuron content
• Diuron content
• Product identity
• Physical appearance
• Suspension stability
• Redispersibility
• Particle-size distribution
• Wet sieve residue
• Viscosity
• pH
• Persistent foam
• Pourability
• Low-temperature stability
• Heat stability
• Packaging compatibility
• Fill-volume control
• Seal integrity
• Label verification
• Batch consistency

Available Documents

Commercial document support may include:

• COA — Certificate of Analysis
• SDS — Safety Data Sheet
• TDS — Technical Data Sheet
• Product Specification
• Packaging Specification
• Available stability information
• Available registration-supporting technical information
• Batch-related quality documents
• Commercial and shipping documents

Document availability depends on the destination market, registration pathway, cooperation stage and final commercial specification.

Frequently Asked Questions

Request Thidiazuron + Diuron SC Specifications

To evaluate a Thidiazuron 360 g/L + Diuron 180 g/L SC project, please provide:

• Destination country
• Company type
• Required quantity
• Preferred package size
• Cotton-production region
• Ground or aerial application requirement
• Expected harvest period
• Required label language
• Current registration status
• Required technical documents
• Expected purchasing schedule

We will review formulation specifications, packaging compatibility, document availability, production planning and destination-market requirements before confirming the commercial proposal.

Thidiazuron 360 g/L + Diuron 180 g/L SC is supplied for professional B2B procurement, registration and wholesale distribution.