Kovcheg

Technology of Selective Weed Control

"Kovcheg" is a specialized agronomic tool based on bentazone, an active substance from the benzothiadiazinone group. Unlike systemic agents that translocate through phloem and xylem, this herbicide operates on the principle of contact action. Its key advantage is pronounced selectivity, allowing for the effective suppression of broadleaf weed development in grain and legume crops without inhibiting the main crop stand.

Cellular Mechanism of Action

The preparation functions by blocking the photosynthesis process. Upon contact with the leaf surface, bentazone interrupts electron transport in photosystem II. For weeds such as common ragweed, common lambsquarters, or pigweed, this leads to an inevitable cessation of growth and subsequent tissue necrosis. The selectivity of "Kovcheg" is achieved because crop plants (wheat, soybean, pea, rice) can metabolize the active substance into non-toxic forms, whereas weeds lack such protective enzymatic mechanisms.

Agrotechnical Application Features

• Formulation and Stability: The product is available as an aqueous solution, ensuring excellent solubility in tank mixtures and rapid adsorption by the leaf blade.
• Controlled Spectrum: Effective against key problematic weeds: cleavers, shepherd's purse, wild radish, and common chickweed.
• Rates and Intensity: A single treatment with a dosage of 1.5–3 L/ha is regulated. It is crucial to consider the weed growth stage—maximum efficiency is achieved during early development (cotyledon to 2–4 leaf stage), when the weed's leaf surface area allows for the absorption of a sufficient dose of the active ingredient.
• Technological Flexibility: Classified as a post-emergence foliar herbicide, the product allows for application after assessing the actual weed pressure in the field following crop emergence.

The manufacturer, "Nanjing Essence Fine-Chemical Co., Ltd." (China), has prioritized composition stability, which is critical for contact plant protection products requiring strict adherence to concentration levels. When applying under proper regulations, the product's Hazard Class 3 allows for operations with minimal risks to the operator and the environment while maintaining high-level weed control across treated fields.