Stefextra, SE

Synergistic chemistry for weed-free crops

«Штефекстра, СЕ» (Stefeckstra, SE) from DDE Farm AG is a sophisticated herbicide formulation containing Terbuthylazine and S-metolachlor. It is engineered to target a wide spectrum of annual broad-leaved and grass weeds in maize, sunflower, and sorghum. The technical prowess of this product lies in its ability to function as both a residual soil herbicide and a post-emergence control agent.

Technical breakdown of components

• S-metolachlor: This chloroacetamide acts as a shoot and root inhibitor, preventing weeds from establishing by disrupting lipid and protein synthesis. It is highly effective when absorbed by the coleoptile (grasses) or hypocotyl (broad-leaved weeds) during germination.
• Terbuthylazine: As a triazine derivative, it acts by inhibiting photosynthesis at the photosystem II site. This provides rapid knockdown of emerged weeds, complementing the residual soil action of the S-metolachlor.

Applied performance

The suspension concentrate formulation ensures that the active ingredients remain in a stable, homogeneous state within the spray tank, promoting uniform coverage. With a recommended dosage of 4–4.5 l/ha, this herbicide provides a prolonged protection window, effectively controlling multiple germination flushes throughout the season.

The product's selective nature is its core strength: it provides professional-grade weed management for crops like sorghum and maize while maintaining excellent crop safety. Its systemic mobility within the plant ensures that the active substances reach the growth points of the weeds, providing reliable results even under challenging field conditions.