ProLan, KE (propizochlor, 720 g/l)

Technical Insights: The Efficacy of ProLan (Propisochlor 720 g/l)

The ProLan soil herbicide is formulated around propisochlor at a concentration of 720 g/l. As a selective systemic herbicide, it provides robust control of annual grasses and a wide range of broad-leaved weeds in crops such as soybeans, sunflowers, corn, and winter rapeseed. Chemically, propisochlor belongs to the chloroacetamide class, yet it is distinguished by high selectivity toward cultivated plants and rapid degradation in the soil, which eliminates phytotoxicity concerns for succeeding crops in a rotation.

Mechanism of Action: Inhibiting Vital Processes

The product's efficacy is rooted in its systemic absorption. Once applied to the soil, the active ingredient is taken up by germinating weeds through the coleoptile (in grasses) or hypocotyl (in broad-leaved species). The core mechanism involves inhibiting protein and nucleic acid synthesis and blocking cell division in meristematic tissues. This ensures the weed is eradicated before it breaks the soil surface or immediately upon germination.

• Systemic Activity: The preparation is rapidly absorbed by the root system, creating a long-lasting protective barrier.
• Soil Efficacy: Performance is dependent on soil moisture; optimal efficacy is achieved when sufficient soil moisture is present at the time of application.
• Selectivity: The emulsifiable concentrate formulation allows for wide-spectrum usage without inhibiting the growth of the primary crop.

Operational Guidelines

ProLan must be applied pre-emergence (before crop germination). The application rate is 2–3 liters per hectare. Technical preparation of the seedbed is critical: the soil surface should be fine-textured and free of large clods, as plant debris or large soil aggregates significantly reduce the contact surface between the herbicide and the soil particles. The product is categorized as Hazard Class 3, requiring standard safety protocols during handling and application.