Bispyribac-sodium 200g/L + Pyrazosulfuron-ethyl 175g/L OD-Bispyribac-sodium + Pyrazosulfuron-ethyl (20%+17.5%) Herbicides Mixture

• Customization: Available
• CAS No.: 125401-92-5
• Formula: C19H17N4NaO8
• Model NO.: Bispyribac-sodium 200g/L + Pyrazosulfuron-ethyl 17
• Appearance: Liquid
• Method of Application: Cauline Leaf, Soil Treatment Agent
• Usage: Selective
• Composition: Organic
• Specific Conductivity: The Tag Type Herbicides
• Colour: White
• Weedicide: Herbicides Mixture
• Shelf life: 2 years
• Formulation: OD
• Quality: TOP
• Transport Package: Follow Customer′s Request
• Specification: GB/FAO/SGS
• Trademark: TOP AGRO
• Origin: Zhejiang, China
• HS Code: 3808
• Production Capacity: 1, 000 T/Y

Product Description

Product Description

 

Common Name	Bispyribac sodium
CAS Number	125401-92-5	Molecular Weight	452.350
Density	1.379 g/cm3	Boiling Point	686.4ºC at 760 mmHg
Molecular Formula	C19H17N4NaO8	Melting Point	223-224°C

Density	1.379 g/cm3
Boiling Point	686.4ºC at 760 mmHg
Melting Point	223-224°C
Molecular Formula	C19H17N4NaO8
Molecular Weight	452.350
Flash Point	368.9ºC
Exact Mass	452.094421
PSA	147.07000
LogP	1.24910
Storage condition	0-6°C
Water Solubility	73.3 g/l at 20 ºC

Common Name	Pyrazosulfuron-ethyl
CAS Number	93697-74-6	Molecular Weight	414.39400
Density	1.44	Boiling Point	N/A
Molecular Formula	C14H18N6O7S	Melting Point	180-182°C

Density	1.44
Melting Point	180-182°C
Molecular Formula	C14H18N6O7S
Molecular Weight	414.39400
Flash Point	170 °C
Exact Mass	414.09600
PSA	172.01000
LogP	1.45910
Index of Refraction	1.44
Storage condition	0-6°C

 

Packaging & Shipping

 

For liquid	200Ltr/drum, 20L/drum, 1L/bottle, 500ml/bottle, 250ml/bottle, 100ml/bottle.
For solid	25 kg/drum, 25kg/bag, 1kg/bag or on the requirement of client.
Delivery Detail	20-30days

 

Applications

Bispyribac sodium is a selective, systemic and post emergent herbicide used to eradicate grasses and broad leaf weeds. Bispyribac sodium is also an acetolactate synthase (ALS or known as AHAS) inhibitor.

Pyrazosulfuron-ethyl, one of the acetolactate synthase inhibiting herbicides in the sulphonylurea family, has been widely used to control weed growth in commercial cereal, soybean, and vegetable fields.
 

The mixture of Pyrazosulfuron-ethyl and Bispyribac-sodium is a herbicide combination used in rice cultivation for broad-spectrum weed control. Below are its key applications, advantages, and precautions:

1. Target Weeds

This mixture is effective against a wide range of grass, sedge, and broadleaf weeds in rice fields, including:

• Grasses: Echinochloa crus-galli (Barnyard grass), Leptochloa chinensis (Chinese sprangletop).

• Sedges: Cyperus difformis (Smallflower umbrella sedge), Cyperus iria (Rice flatsedge).

• Broadleaves: Monochoria vaginalis (Monochoria), Ludwigia spp. (Water primrose).

 

2. Application Details

Recommended Crops

• Primarily used in transplanted rice and direct-seeded rice.

• Some formulations may be labeled for use in other crops (check local regulations).

Dosage & Timing

• Pyrazosulfuron-ethyl: 10-20 g a.i./ha (often formulated at 10% WP or 70% WG).

• Bispyribac-sodium: 15-30 g a.i./ha (commonly 10% SC or 20% SC).

• Application Stage:

  • Early post-emergence (2-3 leaf stage of weeds).

  • Avoid application during the tillering stage of rice to prevent crop injury.

Method

• Spray application with sufficient water (500-600 L/ha).

• Maintain 2-3 cm water level in the field for 3-5 days after application.

 

3. Advantages of the Mixture

• Synergistic effect: Combines ALS inhibitors (both herbicides target acetolactate synthase but bind differently, reducing resistance risk).

• Broad-spectrum control: Covers grasses, sedges, and broadleaves.

• Reduced herbicide resistance: Mixing modes of action delays weed resistance.

 

4. Precautions

• Crop Safety: Rice varieties may differ in tolerance; test before large-scale use.

• Phytotoxicity Risk: Avoid spraying under high temperatures (>35°C) or when rice is stressed (drought, waterlogging).

• Residual Effects: May affect subsequent sensitive crops (e.g., vegetables); follow label recommendations for rotation intervals.

• Environmental Concerns: Do not contaminate water bodies (toxic to aquatic organisms).

 

5. Comparison with Single Herbicides

Herbicide	Target Weeds	Pros	Cons
Pyrazosulfuron	Broadleaves, sedges	Long residual activity	Weak on grasses
Bispyribac	Grasses, some broadleaves	Quick action	Limited sedge control
Mixture	All major rice weeds	Comprehensive control	Higher cost

 

6. Regulatory Status

• India: Registered for rice (e.g., Londax Power®, Nominee Gold®).

• Southeast Asia: Widely used in Vietnam, Thailand, Philippines.

• Always check local guidelines for approved formulations and dosages.

 

This mixture is a cost-effective solution for diverse weed complexes in rice. Proper timing, water management, and adherence to safety protocols are critical for efficacy and crop safety. For resistance management, rotate with herbicides having different modes of action (e.g., Pretilachlor + Pyrazosulfuron).

 

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