---
description: "Product Attribute\r\nSpecification\r\n\r\n\r\n\r\n\r\nProduct Name\r\nMaleic Hydrazide 80% WDG\r\n\r\n\r\nActive Ingredient\r\nMaleic Hydrazide\r\n\r\n\r\nContent\r\n80%\r\n\r\n\r\nFormulation\r\nWDG — Water-Dispersible Granule\r\n\r\n\r\nProduct Type\r\nPlant Growth Regulator\r\n\r\n\r\nPrimary Function\r\nPre-harvest sprout suppression\r\n\r\n\r\nMain Crop Direction\r\nPotato and onion\r\n\r\n\r\nAdditional Use Direction\r\nTobacco sucker suppression where registered\r\n\r\n\r\nApplication Timing\r\nPre-harvest / crop-specific timing\r\n\r\n\r\nUptake\r\nPrimarily through treated foliage\r\n\r\n\r\nMovement\r\nSystemic translocation to actively growing tissues and storage organs\r\n\r\n\r\nMain Physiological Effect\r\nSuppression of cell division in meristematic tissue\r\n\r\n\r\nStandard MOQ\r\nNormally 1,000 kg\r\n\r\n\r\nSupply Direction\r\nB2B import,"
title: Maleic Hydrazide 80% WDG - POMAIS Agriculture
image: https://www.pomais.com/wp-content/uploads/2026/08/Maleic-Hydrazide-80-WDG.jpg
---

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Maleic Hydrazide 80% WDG

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[Plant Growth Regulator](https://www.pomais.com/products/plant-growth-regulator/)

# Maleic Hydrazide 80% WDG

POMAIS **Maleic Hydrazide 80% WDG** is a systemic plant growth regulator used primarily as a pre-harvest sprout suppressant in approved potato and onion programs.

Applied to healthy crop foliage before harvest, Maleic Hydrazide is absorbed by the leaves and translocated to actively growing tissues and storage organs. In potatoes, it moves from treated foliage into the tubers, where it suppresses cell division associated with later sprout development.

Correct application timing is essential. Maleic Hydrazide does not replace curing, temperature control or professional storage management. Its value comes from integrating field treatment with a planned storage program to reduce sprouting and maintain marketable crop quality.

- Designed for Professional Buyers & Bulk Orders
- We support custom packaging, labeling, and formulation to meet your market needs.
- Export wholesale inquiries only.
- Please include destination country, business type (importer/distributor/registrant), and expected volume.
- Retail requests will not be processed.

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## About Maleic Hydrazide 80% WDG

| Product Attribute | Specification |
| --- | --- |
| **Product Name** | Maleic Hydrazide 80% WDG |
| **Active Ingredient** | Maleic Hydrazide |
| **Content** | 80% |
| **Formulation** | WDG — Water-Dispersible Granule |
| **Product Type** | Plant Growth Regulator |
| **Primary Function** | Pre-harvest sprout suppression |
| **Main Crop Direction** | Potato and onion |
| **Additional Use Direction** | Tobacco sucker suppression where registered |
| **Application Timing** | Pre-harvest / crop-specific timing |
| **Uptake** | Primarily through treated foliage |
| **Movement** | Systemic translocation to actively growing tissues and storage organs |
| **Main Physiological Effect** | Suppression of cell division in meristematic tissue |
| **Standard MOQ** | Normally 1,000 kg |
| **Supply Direction** | B2B import, distribution and registration cooperation |
| **Document Support** | COA, SDS, TDS, product specification and available registration information |

Final crops, application rates, growth stages, harvest intervals and residue requirements must follow the approved destination-market label.

## What Is Maleic Hydrazide 80% WDG?

Maleic Hydrazide is a plant growth regulator rather than a conventional insecticide, fungicide or weed-control product.

Its main commercial use is the regulation of unwanted new growth after the crop has already produced the storage organ or plant structure that needs to be protected.

For potato and onion programs, this means:

- Applying the product in the field before harvest
- Allowing healthy foliage to absorb the active ingredient
- Moving the active ingredient into tubers or bulbs
- Suppressing later bud and sprout development
- Supporting the subsequent storage-management program

Maleic Hydrazide is therefore different from products applied inside a warehouse after the crop has already been harvested.

Buyers evaluating other growth-management products can also review the POMAIS [plant growth regulator portfolio](https://www.pomais.com/products/plant-growth-regulator/).

## How Does Maleic Hydrazide Work?

### Foliar Uptake and Systemic Translocation

Maleic Hydrazide is applied to the growing crop while sufficient healthy foliage is still available for uptake.

After absorption through the leaves, the active ingredient is systemically transported to actively growing tissues.

In potatoes, an important part of this process is movement from the treated foliage through the plant into developing tubers.

This is why the condition of the crop canopy matters.

A severely senescent, drought-stressed or damaged canopy may not absorb and transport the product as efficiently as healthy functional foliage.

### Suppression of Cell Division at Bud Meristems

Maleic Hydrazide acts on actively dividing meristematic tissue.

By suppressing cell division, it reduces the ability of buds to resume normal growth.

In stored potatoes or onions, this can delay or reduce sprout development.

The product should therefore be understood as a **growth-suppression tool**, not as a material that physically removes sprouts after they have already developed.

Its performance depends on the active ingredient reaching the relevant growing tissue before harvest.

## Maleic Hydrazide for Potato Sprout Suppression

Potato is the most important application direction for this product page.

Maleic Hydrazide is applied in the field before harvest and becomes part of the later potato-storage strategy.

For a broader crop-management program, buyers can review the POMAIS [potato crop protection solutions](https://www.pomais.com/solution/potato/).

### Pre-Harvest Application

The product is applied while the potato crop still has enough healthy green foliage for foliar uptake and systemic movement.

The exact application window depends on:

- Variety
- Crop maturity
- Tuber development
- Foliage condition
- Temperature
- Soil moisture
- Irrigation
- Expected harvest timing
- Local registration

The objective is to apply late enough that tuber development has reached the approved stage, but early enough for the plant to absorb and transport Maleic Hydrazide effectively.

### Storage Sprout Suppression

After successful pre-harvest uptake and translocation, Maleic Hydrazide can help suppress sprout development during storage.

Potential commercial benefits include:

- Reduced sprout development
- Lower need for corrective sprout management
- Support for longer storage programs
- Improved storage management flexibility
- Reduced physiological losses associated with excessive sprouting

Actual storage performance still depends on:

- Variety
- Tuber maturity
- Residue level achieved
- Curing
- Storage temperature
- Relative humidity
- Ventilation
- Storage duration

Maleic Hydrazide should therefore be integrated into storage management rather than presented as a replacement for it.

### Volunteer Potato Suppression

Where included on the local label, Maleic Hydrazide may also reduce the ability of tubers left in the field after harvest to sprout in the following crop.

This can support management of **volunteer potatoes**.

Volunteer potatoes can:

- Compete with rotational crops
- Carry pests or diseases
- Complicate future weed-control programs
- Interfere with crop rotation

This benefit should not be expressed as complete elimination.

Actual volunteer suppression depends on treatment performance, tuber exposure and field conditions.

## Maleic Hydrazide for Onion Sprout Control

Maleic Hydrazide also has an established role in onion storage programs where registered.

As with potatoes, the treatment is generally made **before harvest**, while the crop still has sufficient green foliage for uptake.

### Why Pre-Harvest Application Matters

Maleic Hydrazide needs to enter the plant before the bulbs are placed in storage.

Once absorbed and translocated to the growing points, it can help suppress later sprout development.

Application planning should consider:

- Bulb maturity
- Top condition
- Green leaf area
- Irrigation status
- Temperature
- Crop stress
- Harvest timing

Do not assume that the same application stage used in potato also applies to onion.

### Storage Management Still Matters

Maleic Hydrazide does not replace:

- Proper curing
- Temperature management
- Humidity control
- Ventilation
- Disease management
- Warehouse sanitation

Its role is to reduce physiological sprout growth as one part of a complete storage program.

The same principle applies to shallot, garlic or other bulb crops only where the exact crop is included on the local product registration.

## Tobacco Sucker Control Where Registered

Maleic Hydrazide also has a different plant-growth-regulation use in tobacco.

In registered tobacco programs, it may be used to suppress axillary bud development and sucker growth after topping.

The objective is different from potato or onion sprout suppression, but the underlying principle remains related to suppression of actively growing meristematic tissue.

Tobacco use should remain a secondary application direction on this page.

Do not transfer potato or onion application timing, rates or residue instructions to tobacco.

## When Should Maleic Hydrazide Be Applied?

Application timing is one of the most important factors determining performance.

Maleic Hydrazide must be applied when the crop can still absorb and transport the active ingredient but has also reached the maturity stage required by the local label.

### Maintain Functional Green Foliage

The crop needs adequate healthy foliage.

Avoid waiting until:

- Most leaves have senesced
- Canopy activity has declined severely
- Disease has destroyed significant leaf area
- Drought stress has stopped normal crop growth

### Confirm Storage-Organ Maturity

Tubers or bulbs must also be sufficiently developed.

Premature treatment may affect crop development.

The correct maturity stage should therefore be based on the approved crop label rather than a universal number of days before harvest.

### Avoid Severe Crop Stress

Performance may become less predictable when the crop is affected by:

- Severe drought
- Excessive heat
- Waterlogging
- Major nutrient stress
- Disease
- Significant insect damage

### Consider Rainfall and Irrigation

Sufficient time is needed for foliar uptake.

Avoid application when rainfall or overhead irrigation is expected during the product-specific absorption period.

Do not publish one universal rainfastness interval unless supported by the exact registration.

## What Affects Maleic Hydrazide Performance?

Maleic Hydrazide performance depends on more than the declared 80% concentration.

### Crop Maturity

Treatment must fit the physiological stage of the crop.

### Leaf Condition

Healthy green foliage supports uptake and translocation.

### Water Stress

Severely drought-stressed crops may absorb and move the active ingredient less effectively.

### Temperature

Extreme environmental conditions can influence normal plant metabolism and uptake.

### Spray Coverage

Uniform foliar treatment supports more consistent uptake.

Poor spray distribution may produce variable results across the field.

### Application Timing

Late application after canopy decline may reduce movement into storage organs.

Application too early may interfere with crop development.

For this reason, timing should be treated as a technical decision rather than simply “spray before harvest.”

## What Maleic Hydrazide Does Not Replace

Maleic Hydrazide is sometimes misunderstood as a complete storage solution.

It is not.

### It Is Not an In-Storage Fogging Treatment

The main potato and onion positioning is **field application before harvest**.

### It Does Not Replace Curing

Proper curing remains important for wound healing and storage preparation.

### It Does Not Replace Temperature Control

Storage temperature continues to influence respiration, dormancy and disease development.

### It Does Not Replace Humidity and Ventilation Management

Warehouse conditions must still be managed according to the crop and intended storage period.

### It Is Not a Corrective Treatment for Heavy Existing Sprouting

The product is intended to suppress future growth after successful pre-harvest uptake.

It should not be presented as a product that removes large sprouts from already stored produce.

## Maleic Hydrazide 80% WDG Formulation

WDG means **Water-Dispersible Granule**.

The granules disintegrate and disperse in water during spray preparation.

They should not automatically be described as completely dissolving in water.

### Main WDG Features

A properly developed Maleic Hydrazide WDG may offer:

- High active ingredient concentration
- Compact dry packaging
- Lower dust than fine powder formulations
- Good flowability
- Convenient weighing
- Rapid granule disintegration
- Uniform dispersion when properly prepared
- Efficient B2B transport and storage

### Correct Tank Preparation

Where permitted by the product label:

1. Fill the spray tank partly with clean water.
2. Begin agitation.
3. Add the measured WDG gradually.
4. Allow the granules to disintegrate and disperse.
5. Add other approved components according to the required mixing order.
6. Complete the tank with water.
7. Maintain adequate agitation during application.

## Quality Control for Maleic Hydrazide 80% WDG

For B2B buyers, WDG quality should be evaluated beyond the active ingredient declaration.

| Quality Parameter | Buyer Relevance |
| --- | --- |
| **Maleic Hydrazide Assay** | Confirms the declared 80% content |
| **Moisture** | Influences storage stability and caking |
| **Granule Integrity** | Supports transport and handling |
| **Disintegration** | Confirms granule breakup in spray water |
| **Dispersion / Suspensibility** | Supports uniform spray preparation |
| **Wet Sieve Residue** | Helps reduce nozzle and filter blockage |
| **Particle Distribution** | Influences dispersion consistency |
| **Persistent Foam** | Affects tank filling and mixing |
| **Flowability** | Supports accurate measuring and pouring |
| **Dust / Attrition** | Influences handling quality |
| **Heat Stability** | Supports storage in warm climates |
| **Packaging Moisture Barrier** | Protects the WDG during storage and shipping |
| **Pack-Weight Accuracy** | Supports commercial batch consistency |

Specific release tests should reflect the actual POMAIS formulation specification and batch-control procedure.

Claims such as a particular analytical release method, freeze-thaw protocol or fixed shelf life should only be published when supported by the corresponding product specification or stability data.

## Packaging, Storage and B2B Supply

POMAIS supplies Maleic Hydrazide 80% WDG for qualified importers, agricultural distributors, registration companies and crop-protection brands.

### Packaging Options

Potential packaging may include:

- 100 g
- 250 g
- 500 g
- 1 kg
- 5 kg
- 10 kg
- 20 kg
- 25 kg
- Other commercial pack sizes where suitable

Available project options may include:

- Multilingual labels
- Moisture-resistant inner packaging
- Retail cartons
- Export cartons
- Batch coding
- Shipping marks
- Market-specific pack configurations

Final packaging depends on registration, order quantity and WDG moisture-protection requirements.

### Storage

Store the product:

- In the original sealed packaging
- In a dry warehouse
- Away from humidity
- Away from direct sunlight
- Away from excessive heat
- Away from food and animal feed
- Under conditions stated in the final SDS

WDG packaging should remain properly sealed to reduce moisture uptake and caking.

### Available Documents

Commercial and registration support may include:

- **COA — Certificate of Analysis**
- **SDS — Safety Data Sheet**
- **TDS — Technical Data Sheet**
- **Product Specification**
- **Packaging Specification**
- **Available Stability Information**
- **Available Efficacy Information**
- **Available Residue Information**
- **Available Registration-Supporting Information**
- **Batch-Related Quality Documents**
- **Commercial and Export Documents**

## Frequently Asked Questions

### What is Maleic Hydrazide 80% WDG used for?

It is mainly used as a plant growth regulator for pre-harvest sprout suppression in approved potato and onion programs.

### Is Maleic Hydrazide a plant growth regulator?

Yes.

Its main commercial role is regulation of unwanted new growth rather than conventional pest or disease control.

### How does Maleic Hydrazide prevent sprouting?

It is absorbed through crop foliage and translocated to actively growing tissues, where it suppresses cell division in developing buds and meristems.

### Is Maleic Hydrazide applied before or after harvest?

For its main potato and onion sprout-suppression uses, it is generally applied **before harvest** according to the local label.

### Can Maleic Hydrazide be applied inside a potato store?

Its primary potato positioning is pre-harvest field treatment, not an in-storage fogging treatment.

### How does Maleic Hydrazide reach potato tubers?

After foliar uptake, Maleic Hydrazide is systemically translocated from the treated foliage into the plant, including movement toward the developing tubers.

### When should Maleic Hydrazide be applied to potatoes?

The crop should have reached the registered maturity stage while still maintaining enough healthy foliage for effective uptake and translocation.

The exact timing must follow the local label.

### Does crop stress affect performance?

Yes.

Severe drought, excessive heat, damaged foliage or other major stress can influence uptake and translocation.

### Can Maleic Hydrazide suppress volunteer potatoes?

Where included on the local label, pre-harvest treatment may reduce the sprouting ability of tubers left in the field and therefore help manage volunteer potatoes in the following crop.

### Can Maleic Hydrazide be used on onions?

Yes, where registered.

It is used pre-harvest to help suppress sprouting during subsequent onion storage.

### Does Maleic Hydrazide replace cold storage?

No.

Temperature, humidity, ventilation, curing and disease management remain essential parts of storage management.

### What is Maleic Hydrazide used for in tobacco?

In approved tobacco programs, Maleic Hydrazide may be used to suppress sucker or axillary shoot development after topping.

### What does WDG mean?

WDG means Water-Dispersible Granule.

The granules disintegrate and disperse in water during spray preparation.

### Does WDG completely dissolve in water?

Not necessarily.

A WDG formulation is designed to disintegrate and disperse uniformly rather than being defined as a fully soluble product.

### What is the minimum order quantity?

The standard MOQ is normally **1,000 kg**.

### What documents can POMAIS provide?

Depending on the project, support may include COA, SDS, TDS, product specifications, packaging information and available registration-supporting documents.

## Request Maleic Hydrazide 80% WDG Specifications

For a Maleic Hydrazide 80% WDG purchasing, import or registration project, please provide:

- **Destination country**
- **Company type**
- **Required quantity**
- **Preferred package size**
- **Target crop**
- **Intended sprout-control or growth-regulation use**
- **Storage period or market requirement**
- **Current registration status**
- **Required label language**
- **Required technical documents**
- **Expected purchasing schedule**

POMAIS will review the product specification, WDG quality requirements, crop positioning, packaging feasibility and destination-market requirements before confirming the commercial supply program.

**Maleic Hydrazide 80% WDG is supplied for professional pre-harvest growth management, B2B procurement, registration and wholesale distribution.**

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- [BNOA 98% TC](https://www.pomais.com/product/bnoa-98-tc/)
- [Indole-3-Acetic Acid (IAA) 98% TC Plant Growth Regulator](https://www.pomais.com/product/indole-3-acetic-acid-iaa-98-tc/)
- [Ethephon 2SL/480SL Plant Growth Regulator](https://www.pomais.com/product/ethephon-2sl-480sl/)
- [Mepiquat Chloride | Plant Growth Regulator](https://www.pomais.com/product/mepiquat-chloride-plant-growth-regulator/)
- [Paclobutrazol 25% SC | Plant Growth Regulator](https://www.pomais.com/product/paclobutrazol-25-sc/)
- [IBA 2% SP – Indole-3-Butyric Acid Rooting Hormone Powder](https://www.pomais.com/product/iba-2-sp-indole-3-butyric-acid-rooting-hormone-powder/)
- [Thidiazuron 120 g/L + Diuron 60 g/L SC | Cotton Defoliant](https://www.pomais.com/product/thidiazuron-120-g-l-diuron-60-g-l-sc-cotton-defoliant/)
- [Maleic Hydrazide 80% WDG](https://www.pomais.com/product/maleic-hydrazide-80-wdg/)
- [6-Benzylaminopurine 0.15% + Indole-3-Butyric Acid 0.85% SL](https://www.pomais.com/product/6-benzylaminopurine-0-15-indole-3-butyric-acid-0-85-sl/)

[Latest News](https://www.pomais.com/news/)

- [Meet SunAgro at Growtech Antalya 2026 – Booth H6-A120](https://www.pomais.com/meet-sunagro-at-growtech-antalya-2026-booth-h6-a120/)September 3rd, 2026
- [Comparison of SC and SL Pesticide Formulations: How Should Buyers Choose?](https://www.pomais.com/comparison-of-sc-and-sl-pesticide-formulations/)September 20th, 2026
- [How Pesticide Quality Is Controlled Before Export](https://www.pomais.com/how-pesticide-quality-is-controlled-before-export/)September 17th, 2026
- [How Does Private Label Pesticide Manufacturing Work?](https://www.pomais.com/how-does-private-label-pesticide-manufacturing-work/)September 14th, 2026
- [What Expanding Chinese Pesticide Technical Supply Means for Global Buyers](https://www.pomais.com/what-expanding-chinese-pesticide-technical-supply-means-for-global-buyers/)September 11th, 2026
- [How to Set Pesticide Product Specifications Before Supplier Approval](https://www.pomais.com/how-to-set-pesticide-product-specifications-before-supplier-approval/)September 8th, 2026
- [How to Compare Pesticide Suppliers Beyond Price](https://www.pomais.com/how-to-compare-pesticide-suppliers-beyond-price/)September 3rd, 2026
- [COA vs TDS vs SDS for Pesticides: What Each Document Can Verify](https://www.pomais.com/coa-vs-tds-vs-sds-for-pesticides/)September 1st, 2026
- [Choosing WP or WDG for a Pesticide Product Line](https://www.pomais.com/choosing-wp-or-wdg-for-a-pesticide-product-line/)August 27th, 2026
- [Pesticide Sample Testing Before a Bulk Order: What Buyers Should Check](https://www.pomais.com/pesticide-sample-testing-before-a-bulk-order/)August 25th, 2026

[FAQ](https://www.pomais.com/faq-items/)

- [Does Spinosad Kill Thrips?](https://www.pomais.com/faq-items/does-spinosad-kill-thrips/)July 25th, 2026
- [Does Spinosad Kill Mosquitoes?](https://www.pomais.com/faq-items/does-spinosad-kill-mosquitoes/)July 23rd, 2026
- [Does Spinosad Kill Fleas?](https://www.pomais.com/faq-items/does-spinosad-kill-fleas/)July 21st, 2026
- [Does Spinosad Kill Ants?](https://www.pomais.com/faq-items/does-spinosad-kill-ants/)February 24th, 2026
- [Does Spinosad Kill Fungus Gnats?](https://www.pomais.com/faq-items/does-spinosad-kill-fungus-gnats/)February 24th, 2026
- [Does Spinosad Kill Spider Mites?](https://www.pomais.com/faq-items/does-spinosad-kill-spider-mites/)February 24th, 2026
- [Will 2,4-D Kill Broom Sage?](https://www.pomais.com/faq-items/will-24-d-kill-broom-sage/)January 30th, 2026
- [Will 2,4-D Kill Cattails?](https://www.pomais.com/faq-items/will-24-d-kill-cattails/)January 28th, 2026
- [Will 2,4-D Kill Centipede Grass?](https://www.pomais.com/faq-items/will-24-d-kill-centipede-grass/)January 26th, 2026
- [Will 2,4-D Kill Johnsongrass?](https://www.pomais.com/faq-items/will-24-d-kill-johnsongrass/)January 22nd, 2026
- [Fipronil Rapidly Eliminates Fleas, Providing Swift Relief for Your Pet](https://www.pomais.com/faq-items/fipronil-rapidly-eliminates-fleas-providing-swift-relief-for-your-pet/)December 23rd, 2025
- [Does Spinosad Kill Lice Eggs?](https://www.pomais.com/faq-items/does-spinosad-kill-lice-eggs/)November 18th, 2025

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