Gesagard 500 FW EC

Mechanism of Action and Selective Control

Gesagard 500 FW is a professional-grade systemic herbicide formulated with prometryn (500 g/L). Its primary function is the inhibition of photosynthesis in target weeds. By entering through the sprouts and root systems, the active ingredient interrupts the electronic transport in photosystem II, effectively neutralizing the weeds before they can establish competition with the crop for water and nutrients.

The Engineering of Soil-Applied Herbicides

Developed by Syngenta Agro S.A.S. in France, the suspension concentrate (SC) formulation is engineered for maximum performance in soil. Unlike powders, the SC formulation allows for a more uniform distribution within the soil matrix, creating a robust “herbicide barrier.” This barrier is crucial for season-long control of annual broad-leaved and grass weeds, particularly in crops like carrots, garlic, soybeans, and sunflowers.

Technical Application Guidelines

• Selectivity: Gesagard is highly selective, meaning it targets specific weed species while sparing the crop. When applied at the recommended rate of 2–5 L/ha, it provides efficient weed control without inducing stress on the cultivated plants.
• Soil Dynamics: As a pre-emergence herbicide, Gesagard requires adequate soil moisture for activation. The moisture facilitates the movement of the active ingredient into the zone where weed seeds germinate, ensuring the herbicide is positioned correctly in the upper soil layer.
• Operational Constraints: The product is classified with a hazard level of 3 and is restricted to a single application per season. Calibration of application rates is critical: heavier soils require higher doses to achieve the desired concentration, while lighter soils require lower rates.

The manufacturing quality from the Ruvilleux, Ag-Viv site in France ensures high product purity and consistency, which are vital for preventing phytotoxicity and ensuring uniform crop protection. For agricultural professionals, Gesagard represents a proven, high-standard solution for maintaining field cleanliness from the early stages of the growing cycle.