Rhythm, KE, herbicide

Chemical Mechanism and Selectivity

The core of "Rhythm" is the active ingredient quizalofop-P-tefuryl, a graminicide belonging to the aryloxyphenoxypropionate class. Unlike basic forms of quizalofop, the tefuryl ester exhibits enhanced lipophilicity, which is critical for immediate penetration through the waxy cuticle of grass weeds. Once applied, the substance moves systemically via the phloem to the meristematic tissues and rhizomes, inhibiting the acetyl-CoA carboxylase (ACCase) enzyme responsible for fatty acid synthesis. This halts cell division and ensures the complete death of even perennial weeds, such as couch grass.

Technical Application Details

Formulated as an emulsifiable concentrate, "Rhythm" creates a stable dispersion in the spray tank. Due to its selective mode of action, the herbicide is completely safe for broad-leaved crops (rapeseed, soybeans, sunflower) that are physiologically resistant to this compound. Key technical parameters for agronomists include:

• Growth Stage: Optimal application occurs during active weed growth (2–4 leaves for annuals, 10–15 cm height for perennials).
• Efficacy: A single application at a rate of 1.0–2.0 L/ha is sufficient to completely clear the field of grass competition.
• Weather Factor: The herbicide is resistant to rain-off within 1–2 hours after drying on the leaf surface.

The systemic nature of the treatment ensures the destruction of the weed root system, preventing regrowth. Utilizing "Rhythm" is a professional strategy to standardize crop stands and eliminate the yield-limiting factor of grass weed infestation.