Magister, w.r.k.

Systemic Selectivity: How Imazethapyr Works

"Magistr, SL" (w.r.k.) is based on imazethapyr (an imidazolinone), which inhibits the synthesis of essential amino acids in weed cells. Thanks to its systemic mode of action, the product penetrates the plant through both the foliage and the root system. This is crucial for soybean and pea crops: the herbicide moves through the xylem and phloem to reach growth points, leading to the complete destruction of rhizomatous weeds, including couch grass and sow thistle.

Technical Breakdown of Composition and Formulation

The Soluble Concentrate (SL) is the optimal formulation for working with imidazolinones. It ensures immediate solubility in the tank mix, preventing sedimentation and clogging of spray nozzles. The active ingredient penetrates weed tissues faster than powder-based alternatives, reducing reliance on weather conditions immediately after application.

Spectrum of Control and Targeted Application

The product effectively halts the development of broad-leaved and grass species. The primary list of targets includes:

• Persistent Perennials: Couch grass, field bindweed, field sow thistle.
• Resilient Broadleaf Weeds: Common lambsquarters, redroot pigweed, field mustard, common ragweed, shepherd's purse.

The selectivity of "Magistr" allows soybean and pea plants to metabolize the active ingredient, neutralizing its effects, while weeds lose the ability to undergo cell division. While the product is classified as a Category 3 hazard, its high selectivity makes it a fundamental tool for securing clean legume yields.