Greenwich

Mechanism of Action and Selectivity of "Greenwich"

The efficacy of the "Greenwich" herbicide is rooted in its active ingredient, bentazone, which belongs to the benzothiadiazinone chemical class. Unlike systemic herbicides that translocate through the phloem, "Greenwich" acts as a contact herbicide. Its primary function is the disruption of photosynthesis by inhibiting photosystem II within the weed chloroplasts. Due to its high selectivity, the herbicide is tolerated by legume crops such as soybeans and peas, which possess enzymatic systems capable of rapidly metabolizing the active ingredient, while targeted broadleaf weeds irreversibly lose the ability to synthesize ATP.

Technical Application Details

The formulation as an aqueous solution ensures high stability of the tank mix. As a leaf-applied herbicide, thorough coverage is essential, as the contact area directly dictates the speed of weed necrosis.

• Application Rate: 2.0 to 3.0 L/ha, depending on weed spectrum and development stage.
• Pre-harvest Interval (PHI): Only 1 day, significantly reducing the risk of residues in the final harvest.
• Target Weeds: Highly effective against broadleaf species including common ragweed, common lambsquarters, redroot pigweed, velvetleaf, and wild mustard.

Field Performance of "Greenwich"

As a post-emergence selective herbicide, "Greenwich" is an essential component for effective weed management in soybean and pea fields. Classified under hazard class 3, it offers a manageable safety profile under standard handling protocols. The optimal application window is when weeds are at the 2-4 true leaf stage, where their susceptibility to photosynthesis inhibitors is at its peak. Because of its selective nature, the product does not induce phytotoxic stress on the crop, ensuring that the plant's energy remains focused on development and yield potential, even under competitive pressure from weeds.