What Is Paraquat Aqueous and Why It’s a Fast-Acting Non-Selective Herbicide

Introduction to Paraquat Aqueous
Paraquat aqueous is a highly effective, fast-acting, non-selective herbicide widely used for weed control in agriculture, forestry, and non-crop areas. It contains paraquat dichloride dissolved in water, allowing for easier application. Its rapid action on green plant tissue makes it a popular choice for pre-planting and inter-row weed control.

Chemical Characteristics and Mechanism of Action
Paraquat works by interfering with photosynthesis. Once sprayed, it penetrates plant cells and produces reactive oxygen species (ROS) that cause cell membrane damage, leading to rapid desiccation and death of green tissues. It does not translocate within the plant, making it ineffective on underground parts, which limits regrowth control.

Primary Uses and Application Fields
Paraquat aqueous is commonly used for:

• Pre-plant burndown: Killing weeds before sowing crops.

• Inter-row weed management: Especially in plantation crops like banana, rubber, and oil palm.

• Non-crop areas: Such as roadsides, industrial sites, and railways.
  It is also used in no-till or reduced-till farming systems due to its quick action and minimal soil residual activity.

Benefits of Paraquat Aqueous

• Rapid action: Visible effects within hours.

• Broad weed control: Effective against grasses and broadleaf weeds.

• No soil residual effect: Allows planting shortly after application.

• Cost-effective: Especially when compared to mechanical weeding.

Risks and Regulatory Considerations
Paraquat is classified as highly toxic to humans and animals if ingested or improperly handled. Ingesting even small amounts can be fatal. Because of its toxicity, many countries (including the EU) have banned or heavily restricted its use. In countries where it is still permitted, strict usage protocols, protective equipment, and training are mandatory.

Safe Handling and Environmental Concerns
Operators must wear gloves, masks, goggles, and protective clothing. Application near water bodies should be avoided, as paraquat is toxic to aquatic life. It binds tightly to soil particles, which limits leaching, but also means contaminated soil may remain hazardous for some time.

Product Formulations and Usage Instructions
Paraquat aqueous is usually formulated as a 20%–24% SL (soluble liquid). Application rates vary depending on weed density and target area but generally range from 1–2 liters per hectare. A surfactant is often added to improve leaf penetration. Spraying should be done under calm weather to prevent drift.

FAQ About Paraquat Aqueous

Q1: Why is Paraquat aqueous banned in some countries?
Because of its extreme toxicity to humans, with no known antidote, and its risks to handlers and the environment. Safer alternatives are preferred in many regions.

Q2: Can crops be planted after using Paraquat aqueous?
Yes. Since Paraquat has no residual soil activity, crops can typically be planted immediately after application.

Q3: Is Paraquat selective?
No, it is a non-selective herbicide and will damage any green plant tissue it contacts.

Q4: Can Paraquat aqueous be used in organic farming?
No. It is a synthetic chemical and is not approved for organic agricultural practices.

Q5: What should be done in case of accidental exposure?
Immediate medical attention is essential. Do not induce vomiting. Safety data sheets and emergency procedures should always be readily available when using Paraquat.