Pyraclostrobin
Pyraclostrobin: The Premium Fungicide for Superior Crop Protection
Pyraclostrobin is a highly effective broad-spectrum fungicide belonging to the strobilurin class. It provides both protective and curative action against a wide range of fungal diseases in numerous crops.
Key Product Parameters
- Chemical Name: Methyl (2-{[1-(4-chlorophenyl)-1H-pyrazol-3-yl]oxymethyl}phenyl)methoxycarbamate
- CAS Number: 175013-18-0
- Molecular Formula: C19H18ClN3O4
- Appearance: White to light beige powder
- Solubility: 1.9 mg/L in water at 20°C
- Melting Point: 60.5-70.5°C
| Technical Specifications | Values |
|---|---|
| Purity | ≥95% |
| Moisture Content | ≤0.5% |
| pH Value | 5.0-7.0 |
| Storage Stability | 2 years in original packing |
| Recommended Application Rate | 75-250 g a.i./ha |
Pyraclostrobin FAQ Section 1
What crops is Pyraclostrobin most effective on?
Pyraclostrobin demonstrates excellent efficacy across a wide range of crops including cereals (wheat, barley), fruits (grapes, apples), vegetables (tomatoes, potatoes), oilseed rape, soybeans, and various other field crops. Its broad-spectrum activity makes it particularly valuable in integrated pest management systems.
Application Guidelines
| Crop | Target Disease | Application Rate (g a.i./ha) | PHI (days) |
|---|---|---|---|
| Wheat | Septoria tritici, Rusts | 100-150 | 35 |
| Grapes | Downy mildew, Powdery mildew | 125-175 | 21 |
| Potatoes | Early blight, Late blight | 150-200 | 14 |
| Apples | Scab, Alternaria | 100-125 | 28 |
Pyraclostrobin FAQ Section 2
What is the mode of action of Pyraclostrobin?
Pyraclostrobin acts as a QoI (Quinone outside inhibitor) fungicide, blocking mitochondrial respiration by binding to the Qo site of cytochrome bc1 complex. This inhibits ATP production, effectively stopping fungal growth and spore germination. The compound exhibits both preventive and curative activity, with translaminar movement providing protection to untreated leaf surfaces.
Key Benefits of Pyraclostrobin
- Exceptional control of major fungal pathogens
- Long-lasting residual activity (typically 14-21 days)
- Positive physiological effects ("greening effect") enhancing plant health
- Compatibility with most commonly used pesticides
- Flexible application timing (preventive or early curative)
- Low risk of resistance when used in rotation programs
Safety and Handling Information
| Parameter | Value | Classification |
|---|---|---|
| Acute Oral Toxicity (Rat) | LD50 >2000 mg/kg | Category 5 |
| Acute Dermal Toxicity (Rabbit) | LD50 >2000 mg/kg | Category 5 |
| Eye Irritation (Rabbit) | Slightly irritating | Category 2B |
| Soil Half-life (DT50) | 15-70 days (aerobic) | Moderately persistent |
Pyraclostrobin FAQ Section 3
What are the resistance management strategies for Pyraclostrobin?
To minimize resistance development, rotate Pyraclostrobin with fungicides from different chemical classes (e.g., triazoles, SDHIs). Implement integrated pest management practices, limit the number of applications per season (typically no more than 2 sequential applications), and use tank mixes with complementary modes of action. Regular monitoring of field efficacy helps detect early signs of reduced sensitivity.
Compatibility and Mixing Instructions
Pyraclostrobin shows excellent compatibility with most commonly used fungicides, insecticides, and foliar fertilizers. For tank mixing:
- Add products to the spray tank in the following order: water conditioners, dry formulations, liquid formulations, adjuvants
- Maintain proper agitation during mixing and application
- Perform a jar test before large-scale mixing
- Do not mix with strongly alkaline products (pH >8)
Environmental Considerations
Pyraclostrobin has moderate persistence in soil (DT50 15-70 days) and low mobility. To minimize environmental impact:
- Observe buffer zones near water bodies
- Avoid application before heavy rainfall
- Follow label instructions for application rates and timing
- Implement drift reduction techniques