Perun, KS (permethrin, 500 g/l)

Mechanism of Action and Selectivity

Perun, SC is a systemic soil-applied herbicide featuring prometryn at a concentration of 500 g/L. Unlike contact herbicides, it targets the photosynthetic process at the level of thylakoid membranes in weed chloroplasts. The active ingredient is absorbed primarily through the shoots and roots, making it a critical tool for managing early-season weed competition.

Technical Formulation Insights

The suspension concentrate (SC) formulation is the industry standard for prometryn applications. Due to the fine particle size, the product creates a stable suspension when mixed with water. This ensures uniform coverage of the soil surface during spraying and prevents clogging of nozzle filters. The systemic nature of the herbicide allows it to remain effective even under limited post-application moisture, as it maintains mobility in the upper soil profile to form a durable herbicide barrier.

Field Performance

Perun, SC is highly recommended for crops such as sunflower, carrot, coriander, legumes (pea, bean), and potato. Its selective action profile allows target crops to establish a strong start without the stress of early competition from annual broadleaf and certain grass weeds.

• Application Rate: 2–4 L/ha, depending on soil texture and weed pressure.
• Application Timing: Exclusively pre-emergence, restricted to one application per season.
• Optimal Conditions: Maximum efficacy is achieved when applied to moist soil, which is vital for activating the "herbicide shield."

By choosing solutions from Hangzhou Ruijiang Chemical Co., Ltd., growers can significantly reduce the need for mechanical inter-row cultivation and ensure a clean environment for primary crop development.