Butachlor
Butachlor: The Professional Herbicide Solution
Butachlor is a selective pre-emergence herbicide widely used in rice fields and other crops for effective weed control. As an industry-leading chloroacetamide herbicide, Butachlor provides superior protection against various grass weeds and broadleaf weeds.
Product Specifications
- Chemical Name: N-(butoxymethyl)-2-chloro-2',6'-diethylacetanilide
- CAS No.: 23184-66-9
- Molecular Formula: C17H26ClNO2
- Appearance: Amber-colored liquid
- Odor: Mild aromatic
- Solubility: 20 ppm in water at 20°C
Technical Parameters
| Parameter | Specification |
|---|---|
| Purity | ≥94% (Technical grade) |
| Density | 1.0695 g/cm³ at 20°C |
| Vapor Pressure | 6.5×10-5 mmHg at 25°C |
| Flash Point | >100°C |
| Storage Stability | Stable under normal conditions for 2 years |
Butachlor FAQ
Q: What is the recommended application rate for Butachlor in rice fields?
A: The standard application rate for Butachlor in transplanted rice fields ranges from 1.0-1.5 kg active ingredient per hectare. For direct-seeded rice, the recommended rate is 0.75-1.0 kg ai/ha. Always apply within 3-5 days after transplanting or before weed emergence for best results.
Q: How does Butachlor control weeds?
A: Butachlor acts as a shoot and root inhibitor in germinating weeds. It disrupts protein synthesis and inhibits cell division in susceptible plants. The herbicide is absorbed primarily by emerging shoots and secondarily by roots, making it highly effective against grass weeds like barnyard grass and some broadleaf weeds.
Q: What safety precautions should be taken when handling Butachlor?
A: Always wear protective clothing, gloves, and eye protection when handling Butachlor. Avoid inhalation of vapors or spray mist. Do not eat, drink, or smoke during application. Wash thoroughly after handling. In case of skin contact, wash immediately with soap and water. For eye contact, rinse immediately with plenty of water for at least 15 minutes.
Formulation Types
| Formulation | Active Ingredient | Pack Size |
|---|---|---|
| Butachlor 50% EC | 500 g/L | 1L, 5L, 20L |
| Butachlor 5% G | 5% w/w | 10kg, 25kg |
| Butachlor 60% EW | 600 g/L | 100ml, 500ml, 1L |
Application Guidelines
- Apply to moist soil for best results
- Maintain 3-5 cm water level in rice fields after application
- Avoid application during heavy rainfall
- Do not apply to waterlogged conditions
- Best applied in the morning or late afternoon
Compatibility
Butachlor is compatible with most rice herbicides and can be used in tank mixtures with products like:
- Pretilachlor
- 2,4-D
- Bensulfuron-methyl
- Pyrazosulfuron-ethyl
Butachlor FAQ Continued
Q: What weeds does Butachlor control effectively?
A: Butachlor provides excellent control of annual grasses including Echinochloa crus-galli (barnyard grass), Leptochloa chinensis, and Digitaria spp. It also controls certain broadleaf weeds like Monochoria vaginalis and some sedges. For a complete weed spectrum, it's often combined with other herbicides.
Q: How long does Butachlor remain active in soil?
A: Butachlor has a half-life of 21-70 days in soil, depending on soil type, moisture, and microbial activity. In flooded rice fields, persistence is typically 4-6 weeks. The herbicide degrades primarily through microbial action and is not considered persistent in the environment.
Q: Is Butachlor safe for rice plants?
A: When used as directed, Butachlor is selective to rice plants. The tolerance is due to rice's ability to metabolize the herbicide rapidly. However, application timing is crucial - it should be applied after transplanting when rice plants are established but before weed emergence.
Environmental Considerations
| Parameter | Value |
|---|---|
| Soil adsorption (Koc) | 440-1320 mL/g |
| Aquatic toxicity (LC50 fish) | >1.0 mg/L (96h) |
| Avian toxicity (LD50) | >2000 mg/kg |
| Bee toxicity | Practically non-toxic |
Advantages of Butachlor
- Proven efficacy against major rice weeds
- Cost-effective weed control solution
- Flexible application timing
- Long residual activity
- Compatible with integrated pest management
Butachlor FAQ Final
Q: What is the mechanism of action of Butachlor?
A: Butachlor inhibits very long chain fatty acid (VLCFA) synthesis in susceptible plants. This disruption prevents proper cell membrane formation in emerging seedlings, leading to growth inhibition and eventual death of germinating weeds. The specific target is the fatty acid elongase enzyme system.
Q: Can Butachlor be used in other crops besides rice?
A: While primarily used in rice, Butachlor is also registered for use in some other crops including maize, soybean, and vegetables in certain countries. Always check local regulations and label recommendations before use in non-rice crops as sensitivity varies among plant species.
Q: How should Butachlor be stored?
A: Store Butachlor in its original container in a cool, dry, well-ventilated area away from food, feed, and seed. Keep away from direct sunlight and heat sources. Storage temperature should ideally be between 0°C and 35°C. Keep containers tightly closed when not in use.