---
description: "Parameter\r\nSpecification\r\n\r\n\r\nProduct Name\r\nAtrazine + Mesotrione Herbicide\r\n\r\n\r\nActive Ingredients\r\nAtrazine + Mesotrione\r\n\r\n\r\nContent\r\n50% + 5%\r\n\r\n\r\nFormulation\r\nSC (Suspension Concentrate)\r\n\r\n\r\nAtrazine Chemical Family\r\nTriazine\r\n\r\n\r\nMesotrione Chemical Family\r\nTriketone\r\n\r\n\r\nAtrazine HRAC Group\r\nGroup 5\r\n\r\n\r\nMesotrione HRAC Group\r\nGroup 27\r\n\r\n\r\nMode of Action\r\nPSII Inhibition + HPPD Inhibition\r\n\r\n\r\nHerbicide Type\r\nSelective Herbicide\r\n\r\n\r\nMain Crop\r\nCorn, subject to product registration\r\n\r\n\r\nMain Target\r\nSusceptible Annual Broadleaf Weeds\r\n\r\n\r\nAdditional Activity\r\nSelected Annual Grasses, where supported by the product label\r\n\r\n\r\nApplication Timing\r\nPre-emergence or post-emergence, according to approved use"
title: Atrazine 50% + Mesotrione 5% SC | HRAC 5+27 Corn Herbicide - POMAIS Agriculture
image: https://www.pomais.com/wp-content/uploads/2025/09/Atrazine-50SC.jpg
---

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Atrazine 50% + Mesotrione 5% SC | HRAC 5+27 Corn Herbicide

[![Atrazine 50% + Mesotrione 5% SC | HRAC 5+27 Corn Herbicide](https://www.pomais.com/wp-content/uploads/2025/09/Atrazine-50SC-700x700.webp "Atrazine 50SC")](https://www.pomais.com/wp-content/uploads/2025/09/Atrazine-50SC.webp) [Atrazine 50%SC](https://www.pomais.com/wp-content/uploads/2025/09/Atrazine-50SC.webp)

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# Atrazine 50% + Mesotrione 5% SC | HRAC 5+27 Corn Herbicide

Atrazine + Mesotrione is a selective herbicide combination developed for weed management in corn. It combines two active ingredients with different modes of action to provide complementary control of susceptible annual broadleaf weeds and support integrated corn weed management programs.

Atrazine inhibits photosynthesis at Photosystem II (PSII), while Mesotrione inhibits 4-hydroxyphenylpyruvate dioxygenase (HPPD), disrupting carotenoid biosynthesis in susceptible weeds. Their different biochemical targets provide two distinct mechanisms of herbicidal activity.

The combination is primarily positioned for corn weed management, with application timing and target weed spectrum depending on the approved product label and local agricultural conditions.

POMAIS manufactures Atrazine + Mesotrione herbicides for agricultural importers, distributors, registration companies, and brand owners. We offer the 50% + 5% SC specification, together with customized packaging, private label production, and technical documentation support.

- 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 Atrazine 50% + Mesotrione 5% SC | HRAC 5+27 Corn Herbicide

| Parameter | Specification |
| --- | --- |
| Product Name | Atrazine + Mesotrione Herbicide |
| Active Ingredients | Atrazine + Mesotrione |
| Content | 50% + 5% |
| Formulation | SC (Suspension Concentrate) |
| Atrazine Chemical Family | Triazine |
| Mesotrione Chemical Family | Triketone |
| Atrazine HRAC Group | Group 5 |
| Mesotrione HRAC Group | Group 27 |
| Mode of Action | PSII Inhibition + HPPD Inhibition |
| Herbicide Type | Selective Herbicide |
| Main Crop | Corn, subject to product registration |
| Main Target | Susceptible Annual Broadleaf Weeds |
| Additional Activity | Selected Annual Grasses, where supported by the product label |
| Application Timing | Pre-emergence or post-emergence, according to approved use directions |

The two active ingredients are the main components of this herbicide combination. The 50% + 5% SC specification is a formulation option supplied by POMAIS. The agreed technical specification and COA define the applicable content expression and product quality requirements.

## Active Ingredients and Their Modes of Action

Atrazine and Mesotrione belong to different herbicide groups. Understanding their individual functions helps explain the technical purpose of this combination.

### Atrazine – HRAC Group 5 (Photosystem II Inhibitor)

Atrazine belongs to the triazine chemical family and inhibits photosynthesis at Photosystem II.

It interferes with electron transport in the photosynthetic process, preventing susceptible weeds from maintaining normal energy production. This eventually causes photosynthetic disruption, tissue damage, and plant death.

Key characteristics include:

- Inhibits Photosystem II electron transport.
- Can be absorbed through roots and foliage.
- Provides activity against susceptible annual broadleaf weeds.
- Also has activity against certain annual grasses.
- Plays an important role in pre-emergence weed management programs.

Atrazine is an established herbicide active ingredient in corn production, although its use is subject to crop-specific and regional restrictions.

### Mesotrione – HRAC Group 27 (HPPD Inhibitor)

Mesotrione belongs to the triketone chemical family and inhibits 4-hydroxyphenylpyruvate dioxygenase (HPPD).

This enzyme is involved in the production of compounds required for carotenoid biosynthesis. When HPPD is inhibited, carotenoid production is disrupted, leaving chlorophyll more vulnerable to photo-oxidative damage.

Typical symptoms in susceptible weeds include:

- Whitening of leaves.
- Chlorosis.
- Progressive tissue damage.
- Growth inhibition.
- Plant death under effective treatment conditions.

Mesotrione is particularly important for controlling susceptible broadleaf weeds in corn production.

### Why Combine Atrazine and Mesotrione?

Atrazine and Mesotrione target different biochemical processes:

| Active Ingredient | HRAC Group | Target Site | Main Function |
| --- | --- | --- | --- |
| Atrazine | 5 | Photosystem II | Disrupts photosynthetic electron transport |
| Mesotrione | 27 | HPPD | Disrupts carotenoid biosynthesis |

Combining these active ingredients provides two different modes of action within one formulation.

The combination can offer complementary weed control where both components are effective against the target weed species at the approved application rate.

However, different modes of action do not automatically prove synergistic performance. The actual contribution of each component depends on the formulation, target species, application conditions, and supporting efficacy data.

## Target Weeds and Crop Applications

Atrazine + Mesotrione is primarily positioned for annual broadleaf weed management in corn. The actual control spectrum depends on the weed species, growth stage, formulation, and local product registration.

### Annual Broadleaf Weeds

Depending on the approved product label and supporting efficacy data, susceptible weeds may include species from the following groups:

| Weed Group | Common Examples |
| --- | --- |
| Pigweeds | Amaranthus spp. |
| Lambsquarters | Chenopodium spp. |
| Smartweeds | Polygonum spp. |
| Velvetleaf | Abutilon theophrasti |
| Ragweeds | Ambrosia spp. |
| Nightshades | Solanum spp. |

These examples represent potential target weeds for this active ingredient combination. They should not be interpreted as a guarantee of control for every species or resistant population.

### Annual Grass Weeds

Atrazine and Mesotrione can provide activity against certain annual grasses, but grass control varies considerably by species and application conditions.

Barnyardgrass, crabgrass, and foxtails should not automatically be considered fully controlled by this combination.

Where grass weeds dominate the field, a suitable grass-control herbicide may be required as part of an integrated program, subject to local registration and compatibility requirements.

### Main Crop: Corn

Corn is the primary crop application direction for Atrazine + Mesotrione herbicides.

The combination is intended for weed management in approved corn production systems, particularly where annual broadleaf weeds create significant competition during early crop development.

Potential application systems include:

- Field corn weed management.
- Early-season broadleaf weed control.
- Pre-emergence programs where registered.
- Early post-emergence applications where permitted.
- Post-emergence weed management according to the approved product label.

Crop selectivity depends on the corn type, crop growth stage, formulation, application conditions, and the crop’s ability to metabolize the active ingredients.

Field corn, sweet corn, popcorn, and seed corn should not be treated as interchangeable uses. Each requires confirmation against the specific product label.

For broader corn protection information, see our [Corn Crop Protection Solutions](https://www.pomais.com/solution/corn/).

## Application Timing and Guidelines

Atrazine + Mesotrione can be incorporated into different corn weed management programs depending on the registered application timing.

### Pre-Emergence Application

Where permitted by the product label, pre-emergence application can be used to manage susceptible weeds during the early stages of crop establishment.

Soil type, rainfall, soil moisture, and weed emergence patterns influence the performance of pre-emergence herbicides.

### Early Post-Emergence Application

Early post-emergence applications target young, actively growing weeds.

Weed size and species are important factors when evaluating the expected control spectrum. Early identification helps determine whether the combination is suitable for the field’s weed population.

### Post-Emergence Application

Post-emergence use is an important application direction for Atrazine + Mesotrione combinations.

The two active ingredients provide complementary herbicidal activity against susceptible emerged weeds. Actual performance depends on weed growth stage, spray coverage, weather conditions, and the approved use directions.

### Important Application Considerations

- Confirm the corn type and approved crop growth stage.
- Identify the dominant weed species before selecting a treatment.
- Follow formulation-specific application rates and water volumes.
- Observe label requirements for adjuvants and tank mixtures.
- Avoid spray drift toward sensitive crops and non-target vegetation.
- Follow rainfall restrictions and application intervals stated on the product label.

Application rates, maximum seasonal use, and crop restrictions must be determined from the approved label of the specific formulation.

## Resistance Management – HRAC Groups 5 and 27

Atrazine and Mesotrione have different modes of action, making their combination a potential component of diversified herbicide programs.

However, using two active ingredients in one product does not automatically eliminate resistance risk.

Effective resistance management depends on whether both components independently provide effective control of the target weed species at their respective application rates.

### Recommended Resistance Management Practices

**1. Diversify Herbicide Modes of Action**

Incorporate effective herbicides from other HRAC groups into the overall weed management program where registered.

**2. Avoid Repeated Dependence on the Same Combination**

Repeated use of the same Group 5 + Group 27 combination can maintain selection pressure on susceptible weed populations.

**3. Monitor Weed Survival**

Inspect treated fields for surviving weeds and investigate unexpected control failures.

**4. Integrate Non-Chemical Practices**

Crop rotation, mechanical weed control, cultivation, and prevention of weed seed production can help reduce weed population pressure.

**5. Follow Local Resistance Guidance**

Select rotation partners according to local resistance patterns, product registration, and proven efficacy against the target weeds.

The objective is to maintain effective weed control while reducing excessive reliance on individual herbicide modes of action.

## SC Formulation and Quality Control

Atrazine + Mesotrione is supplied in Suspension Concentrate (SC) formulation.

SC is a liquid formulation in which finely dispersed solid active ingredient particles are suspended in a liquid medium. It provides a convenient liquid product format for storage, transportation, and application according to the product label.

### SC Formulation Characteristics

Important technical characteristics of an SC herbicide include:

- Active ingredient content.
- Suspensibility.
- Wet sieve performance.
- Particle size and dispersion.
- pH.
- Viscosity.
- Persistent foam.
- Storage stability.

These parameters help evaluate formulation quality, physical stability, and handling characteristics.

### Manufacturing and Quality Assessment

POMAIS focuses on formulation consistency and batch quality control during production.

Relevant quality assessment items include:

| Quality Parameter | Purpose |
| --- | --- |
| Active Ingredient Assay | Confirms the content of Atrazine and Mesotrione |
| Suspensibility | Evaluates the suspension performance |
| Wet Sieve Test | Checks coarse particles and formulation residues |
| pH | Monitors formulation characteristics |
| Viscosity | Evaluates flow and handling properties |
| Persistent Foam | Assesses foaming behavior |
| Storage Stability | Evaluates formulation stability under specified conditions |

Actual product specifications and test results are confirmed through the applicable technical documents and batch quality records.

## Environmental and Regulatory Considerations

Atrazine is subject to specific environmental and regulatory controls in several agricultural markets. These requirements should be considered when selecting products for import, registration, and distribution.

### Groundwater and Surface Water Protection

Atrazine can move through agricultural runoff and, under certain soil and environmental conditions, may reach groundwater.

Responsible product use requires attention to:

- Soil characteristics and permeability.
- Rainfall and runoff conditions.
- Groundwater vulnerability.
- Surface water protection.
- Buffer zones and restricted application areas.

### Crop Rotation and Residue Considerations

Crop rotation restrictions depend on the product label, application rate, soil conditions, and local agricultural regulations.

Before planting a rotational crop, confirm the applicable plant-back interval and crop restrictions.

### Regulatory Requirements

Atrazine registration and use restrictions vary between countries and regions.

Before commercializing the product, buyers should confirm:

- Whether Atrazine is approved in the destination market.
- Whether the Atrazine + Mesotrione combination is eligible for registration.
- Approved crops and application timing.
- Maximum application rates and seasonal limits.
- Environmental restrictions and buffer requirements.
- Labeling and technical documentation requirements.

The approved product label and local regulatory requirements take precedence over general product descriptions.

## Packaging and OEM Supply

POMAIS manufactures Atrazine + Mesotrione herbicide formulations for international agrochemical markets.

Our supply services support agricultural importers, distributors, registration companies, and brand owners.

### Product Specification

| Active Ingredients | Formulation | Content |
| --- | --- | --- |
| Atrazine + Mesotrione | SC | 50% + 5% |

The content expression and applicable quality specifications are confirmed in the agreed product documentation.

### Packaging and Private Label Services

We can discuss packaging and labeling requirements according to the destination market and order specifications.

Available cooperation options include:

- Customized product packaging.
- OEM and private label production.
- Multilingual product labels.
- Customized carton and export packaging.
- Product specification confirmation.
- Batch identification and quality documentation.

### Technical Documents

Depending on the product and order requirements, buyers can request:

- COA (Certificate of Analysis).
- SDS (Safety Data Sheet).
- TDS (Technical Data Sheet).
- Product specifications.
- Relevant quality and stability documentation.

MOQ, packaging arrangements, production schedules, and delivery terms are confirmed according to the order requirements.

## Frequently Asked Questions

### What Are Atrazine and Mesotrione?

Atrazine and Mesotrione are two herbicide active ingredients with different modes of action. Atrazine inhibits Photosystem II, while Mesotrione inhibits HPPD and disrupts carotenoid biosynthesis.

### What Is the HRAC Group of Atrazine + Mesotrione?

Atrazine belongs to HRAC Group 5, while Mesotrione belongs to HRAC Group 27. The combination therefore contains two different herbicide modes of action.

### What Weeds Can Atrazine + Mesotrione Control?

The combination is primarily intended for susceptible annual broadleaf weeds in corn, including certain Amaranthus, Chenopodium, and Polygonum species. Activity against selected annual grasses depends on the specific formulation and approved product label.

### Is Atrazine + Mesotrione Suitable for Corn?

Corn is the main crop application direction for this combination. However, field corn, sweet corn, popcorn, and seed corn have different crop safety and registration considerations. Always confirm the approved crop type and growth stage.

### Can Atrazine + Mesotrione Be Used Before or After Weed Emergence?

Depending on the approved product label, the formulation may be used in pre-emergence, early post-emergence, or post-emergence programs. The permitted timing must be confirmed for the specific product.

### Does the Combination Provide Synergistic Weed Control?

The two active ingredients have different biochemical targets and can provide complementary herbicidal activity. Whether a particular combination produces an additive or synergistic effect must be established through appropriate efficacy trials.

### Does Atrazine + Mesotrione Control All Grass Weeds?

No. Its main positioning is broadleaf weed management in corn. Activity against annual grasses varies by species and conditions, so grass-dominant infestations may require additional registered herbicide options.

### Does the Product Help Manage Herbicide Resistance?

The combination contains two different modes of action, but it does not guarantee resistance prevention. Effective resistance management requires both components to control the target weed population and should include herbicide rotation and integrated weed management.

### What Formulation Can POMAIS Supply?

POMAIS offers Atrazine 50% + Mesotrione 5% SC for international agricultural markets. Packaging and private label requirements can be discussed according to customer specifications.

### What Documents Can Buyers Request?

Buyers can request relevant product specifications, COA, SDS, TDS, and other available quality documentation according to the selected product and order requirements.

## Contact POMAIS for Atrazine + Mesotrione Supply

Are you looking for an Atrazine + Mesotrione herbicide manufacturer for your agricultural distribution market?

POMAIS provides the 50% + 5% SC formulation, together with packaging customization, OEM production, and export supply support.

We welcome inquiries from:

- Agrochemical importers.
- Agricultural distributors.
- Pesticide registration companies.
- Agrochemical brand owners.
- Wholesale buyers.

Contact our team to discuss product specifications, packaging, technical documents, and supply arrangements.

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- [What Happens When a Pesticide Batch Is Out of Specification?](https://www.pomais.com/pesticide-batch-out-of-specification/)October 19th, 2026
- [How to Audit a Pesticide Specification Against the COA Before Shipment](https://www.pomais.com/pesticide-specification-coa-audit-before-shipment/)October 17th, 2026
- [Pesticide Packaging Compatibility: Why the Container Is Part of Product Quality](https://www.pomais.com/pesticide-packaging-compatibility/)October 15th, 2026
- [Pesticide Storage Stability Data: What Importers Should Check Before Registration and Bulk Supply](https://www.pomais.com/pesticide-storage-stability-data-buyer-checklist/)October 12th, 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
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- [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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