Primus, SE

Chemical Synergy: The Mechanism of Primus, SE

The efficiency of Primus, SE is grounded in the synergy between florasulam and 2,4-D, formulated as an emulsifiable concentrate. This combination offers a dual-mode attack on weed metabolism. Florasulam acts as an inhibitor of the acetolactate synthase (ALS) enzyme, effectively halting essential amino acid synthesis, while 2,4-D acts as a synthetic auxin mimic, causing uncontrolled cellular growth and systemic tissue collapse in weeds.

Technical Specifications and Application Logic

As a selective systemic herbicide, Primus, SE is designed for post-emergence application in cereal crops and maize. Its leaf-applied formulation ensures rapid absorption, allowing the active ingredients to be translocated to the primary growth points. Key technical performance factors include:

• High Adhesion: The emulsifiable concentrate formulation enhances surface tension, ensuring excellent contact with weed foliage and reducing the risk of rain-wash.
• Selective Control: The product is highly effective against challenging broadleaf weeds like bedstraw (Galium aparine), Canada thistle, and chamomile, without causing phytotoxicity to the main crop.
• Comprehensive Spectrum: It provides robust control over common weeds such as white goosefoot, pigweed, shepherd's purse, and common chickweed.

Operational Guidelines

For optimal results, apply Primus, SE once during the post-emergence stage. The recommended application rate is 0.4–0.6 L/ha, depending on the weed density. Categorized under Hazard Class 3, it is safe to use in standard crop management programs for winter wheat, winter barley, spring wheat, and corn. By delivering a lethal dose directly to the growth points of even mature weeds, it serves as a critical component for maintaining yield integrity in modern agronomy.