Diquat 200g/L SL

Active Ingredient: Diquat Dibromide
CAS Number: 85-00-7
Molecular Formula: C₁₂H₁₂Br₂N₂
Classification: Non-selective contact herbicide with slight systemic properties
Primary Use: Controls broadleaf weeds, grasses, and aquatic weeds through rapid desiccation of plant tissues

Mode of Action

Mechanism: Inhibits electron transfer in photosynthesis, leading to the formation of reactive oxygen species (e.g., hydrogen peroxide).
Action Speed: Visible wilting within 24 hours of application; complete foliage desiccation within days.
Systemic Traits: Slightly systemic, but primarily acts on contacted green tissues; does not translocate significantly in plants.

Target Weeds & Applications

Target Weeds	Primary Crops/Areas	Key Uses
Broadleaf weeds (e.g., water hyacinth, dock weeds) Grasses (e.g., barnyardgrass)	Non-crop areas Potatoes Vegetables Orchards Aquatic environments	– Pre-harvest desiccation (e.g., potatoes, cotton, soybeans) – Aquatic weed management – Orchard and farmland weeding – Sugarcane inflorescence inhibition

Formulations & Dosages

Common Formulations

Soluble Liquid (SL): 10% SL, 20% SL, 37.4% SL, 200g/L SL (ideal for foliar and aquatic applications).
Emulsifiable Concentrate (EC): Available in various concentrations for broader mixing flexibility.

Application Rates

Application Type	Dosage	Method	Target Stage
Crop desiccation	3–6 g active ingredient/100m²	Foliar spray	Mature crops before harvest
Farmland weeding (no-till)	4.5–6 g active ingredient/100m²	Foliar spray	Annual weeds in summer corn
Orchard weeding	6–9 g active ingredient/100m²	Foliar spray	Broadleaf weeds in orchards
Aquatic weed control	1–2 L/ha (200g/L SL)	Sub-surface spray	Submerged or floating weeds

Key Features & Benefits

Rapid Action: Visible effects within 24 hours, ideal for emergency weed control.
Broad-Spectrum Efficacy: Effective against annual broadleaf weeds and some grasses; particularly potent on aquatic weeds like water hyacinth.
Low Soil Residue: Strongly adsorbed by soil colloids, minimizing residual toxicity to subsequent crops.
Photodegradable: 80% photolyzed within 4 days under sunlight, reducing environmental persistence.
Cold Tolerance: Performs better than glufosinate ammonium in temperatures below 15°C.
Tank Mix Compatibility: Can be mixed with glyphosate for expanded weed control spectrum.

Safety & Handling

Pre-Harvest Interval (PHI): 7–10 days to ensure minimal residue on harvested crops.
Precautions:
- Avoid spraying on young crop trees or green bark to prevent phytotoxicity.
- Use protective gear (gloves, goggles) during application.
- Keep away from water sources; avoid runoff into rivers or ponds.
Storage: Store in cool, dry conditions; protect from direct sunlight.

Packaging & Distribution

Small Packaging: 500ml, 1L, 5L bottles for small-scale users.
Bulk Packaging: 25L drums, 200L drums, 1000L IBC containers for commercial agriculture.
Global Reach: Exported to Africa, South America, and Southeast Asia; supports OEM/ODM services for custom labeling and formulations.

Environmental Considerations

Aquatic Use: Effective for submerged weed control but must be applied carefully to avoid harming non-target aquatic organisms.
Soil Impact: Non-persistent in soil; safe for use in conservation tillage systems.

Diquat Dibromide Herbicide FAQ

1. What is Diquat Dibromide, and how does it work?

Diquat Dibromide is a non-selective contact herbicide belonging to the bipyridylium class. It disrupts photosynthesis by inhibiting electron transport in plant cells, leading to the production of reactive oxygen species (e.g., hydrogen peroxide). This damages cell membranes, causing rapid wilting and desiccation of green plant tissues. While it has slight systemic properties, it primarily acts where it contacts foliage, making it effective for above-ground weed control.

2. What types of weeds does Diquat control?

Primary targets: Annual and perennial broadleaf weeds (e.g., water hyacinth, dock weeds, lambsquarters).
Secondary control: Some grassy weeds (e.g., barnyardgrass), though less effective on grasses than broadleaf species.
Aquatic use: Effective against submerged and floating weeds in ponds, canals, and irrigation systems.

3. Where is Diquat typically applied?

Agricultural crops: Potatoes, cotton, soybeans, corn (pre-harvest desiccation to dry green tissues and weeds).
Non-crop areas: Orchards, vineyards, roadsides, and industrial sites for broad-spectrum weed control.
Aquatic environments: Management of invasive aquatic plants like water hyacinth and duckweed.

4. What are the common formulations of Diquat?

Soluble Liquid (SL): 10% SL, 20% SL, 200g/L SL (most common for foliar and aquatic applications).
Emulsifiable Concentrate (EC): Used for tank mixing with other pesticides.
Application forms: Foliar sprays, soil treatments (limited systemic action), and sub-surface aquatic applications.

5. How should Diquat be applied for best results?

Timing: Apply to young, actively growing weeds (pre-flowering stage) for maximum efficacy.
Method:
- Foliar spray: Ensure uniform coverage of weed foliage; use ground equipment for precision.
- Aquatic systems: Apply as a sub-surface spray to target submerged weeds without excessive drift.
Mixing: Easily soluble in water; mix with glyphosate or other herbicides for broader weed control.

6. Is Diquat safe for the environment?

Soil safety: Strongly adsorbed to soil particles, minimizing leaching and residual toxicity to subsequent crops.
Water safety: Toxic to aquatic life (fish, algae, invertebrates), so avoid application near water bodies or during windy conditions to prevent runoff.
Biodegradation: Rapidly photolyzed (80% degradation within 4 days under sunlight), reducing persistence in the environment.

7. What are the safety precautions when using Diquat?

Personal protection: Wear waterproof gloves, goggles, and long sleeves to avoid skin/eye contact.
Crop safety: Avoid spraying on young trees or green bark, as it may cause phytotoxicity.
Storage: Store in original containers, away from food, water, and heat sources.
Disposal: Follow local regulations; do not pour excess product into waterways.

8. Can Diquat be used in organic farming?

No, Diquat is a synthetic herbicide and is generally prohibited in organic systems. Organic farming typically requires non-chemical weed control methods (e.g., mulching, mechanical tillage).

9. How does Diquat compare to Paraquat?

Feature	Diquat	Paraquat
Mode of Action	Inhibits photosynthesis via electron transport	Similar mechanism, but Paraquat is more toxic to humans
Selectivity	Non-selective, broad-spectrum	Non-selective, the same
Soil Residue	Low (strong soil adsorption)	Moderate, may persist longer
Toxicity	Moderate (low mammalian toxicity, high aquatic toxicity)	Highly toxic to humans (restricted in many countries)
Common Uses	Aquatic weeds, pre-harvest desiccation	Non-crop weed control, often restricted

10. What is the pre-harvest interval (PHI) for Diquat?

The PHI is typically 7–10 days, meaning no application should occur within this period before crop harvest to ensure residue levels comply with food safety standards.

11. Does Diquat work in cold temperatures?

Yes, Diquat is more effective than glufosinate ammonium in temperatures below 15°C (59°F), making it suitable for early-season or cool-climate weed control.

12. How to manage resistance to Diquat?

Rotation: Avoid continuous use; rotate with herbicides from different modes of action (e.g., glyphosate, acetolactate synthase inhibitors).
Tank mixes: Combine with other herbicides (e.g., glyphosate) to target multiple physiological pathways and reduce resistance risk.

13. Can Diquat be used on aquatic weeds without harming fish?

Diquat is toxic to aquatic organisms, so strict application guidelines must be followed:

Use approved formulations for aquatic use.
Apply at low rates and avoid overspray into water bodies.
Consult local environmental regulations before use in or near water.

14. What is the shelf life of Diquat?

Diquat has a shelf life of 2–3 years when stored in sealed containers at cool, dry temperatures (avoid freezing or extreme heat).

15. Is Diquat harmful to humans?

Toxicity: Moderate toxicity if ingested or absorbed through skin; causes irritation to eyes and skin.
Safety measures: Follow label instructions for protective gear and avoid inhaling spray mist. In case of exposure, rinse thoroughly and seek medical attention.

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