Contactwin

Technological design of Kontakttwin: chemical synergy

The performance of "Kontakttwin" by Feinkemie Schwebda, F.GmbH (Germany) relies on the synergistic combination of phenmedipham and ethofumesate. This blend of carbamates and benzofuran derivatives addresses weed control in fodder beet crops by targeting physiological processes across both foliage and root systems.

Mode of Action and Selectivity

Phenmedipham acts as a potent contact agent, inhibiting photosynthesis in the young leaves of broad-leaved weeds, while ethofumesate provides systemic uptake via roots and seedlings. This is particularly critical for managing challenging species such as common lambsquarters, redroot pigweed, field pennycress, common chickweed, and cleavers. A key advantage of this formulation is its selective nature: when applied at recommended rates, the crop remains shielded from chemical stress.

Practical Field Application

• Growth Stage: As a post-emergence herbicide, the product allows for precise timing, targeting weeds during their most vulnerable growth stages.
• Grass Control: The formula also effectively manages the development of barnyard grass, wild oat, and green foxtail.
• Application Technology: The emulsifiable concentrate (EC) formulation ensures excellent spreadability and coverage of the leaf surface. With up to 3 applications allowed per season, growers gain flexibility in managing multiple germination flushes of weeds.

The application rate ranges from 1.0 to 2.0 liters per hectare, providing the necessary concentration for high-efficacy contact action in intensive farming systems. The product falls into hazard class 3, requiring standard safety protocols for handling agrochemicals.