Pendimethalin
Pendimethalin is a highly effective pre-emergence herbicide widely used in agricultural and non-crop applications. This selective herbicide controls a broad spectrum of annual grasses and broadleaf weeds, making it a preferred choice for farmers and turf managers.
Pendimethalin Product Specifications
- Chemical Name: N-(1-ethylpropyl)-3,4-dimethyl-2,6-dinitrobenzenamine
- Molecular Formula: C13H19N3O4
- CAS Number: 40487-42-1
- Appearance: Orange-yellow crystalline solid
- Odor: Slight aromatic
- Solubility: 0.3 ppm in water at 20°C
- Vapor Pressure: 4.0 mPa at 25°C
Pendimethalin Technical Parameters
| Parameter | Value |
|---|---|
| Purity | ≥95% |
| Melting Point | 54-58°C |
| Density | 1.19 g/cm3 at 20°C |
| Flash Point | >93°C |
| Half-life in Soil | 30-180 days |
| Application Rate | 1.0-4.0 lb ai/A |
Pendimethalin FAQ
What crops can Pendimethalin be used on?
Pendimethalin is registered for use on numerous crops including corn, soybeans, cotton, peanuts, potatoes, vegetables, fruits, and turf. It's particularly effective in field crops and orchards where pre-emergence weed control is needed. Always check the product label for specific crop approvals in your region.
How does Pendimethalin work?
Pendimethalin works by inhibiting cell division in germinating weed seeds. It disrupts microtubule formation during mitosis, preventing root and shoot development in emerging seedlings. The herbicide is absorbed primarily by roots and shoots of germinating weeds, providing effective pre-emergence control.
What is the rainfast period for Pendimethalin?
Pendimethalin typically requires 6-8 hours to become rainfast after application. Under optimal conditions (moderate temperatures and adequate soil moisture), the herbicide binds tightly to soil particles within this time frame. If rain occurs within 6 hours of application, some efficacy may be reduced depending on rainfall intensity.
Pendimethalin Formulations Available
- Emulsifiable Concentrate (EC) - 30% to 38% active ingredient
- Water Dispersible Granules (WDG) - 60% to 65% active ingredient
- Microencapsulated Formulations - 37% to 45% active ingredient
- Ready-to-Use Liquid Formulations - 2% to 4% active ingredient
Pendimethalin Application Guidelines
| Crop | Application Timing | Rate (lb ai/A) |
|---|---|---|
| Corn | Pre-plant or pre-emergence | 1.0-3.0 |
| Soybeans | Pre-plant incorporated | 1.0-2.0 |
| Cotton | Pre-plant or pre-emergence | 1.0-2.0 |
| Turf | Pre-emergence in spring/fall | 1.5-3.0 |
Pendimethalin remains one of the most reliable pre-emergence herbicides in modern agriculture. Its long residual activity and broad-spectrum weed control make it valuable in resistance management programs. When used according to label directions, Pendimethalin provides consistent performance across various soil types and environmental conditions.