Herb 900 KE

Mechanism of Action and Selectivity

The core of 'Gerb 900 KE' is acetochlor, an active ingredient from the chloroacetamides class that inhibits protein and nucleic acid synthesis in the meristematic tissues of weeds. Due to its systemic mode of action, the product is absorbed by the shoots and roots of annual grass and broad-leaved weeds before they even emerge through the soil surface. For an agronomist, this guarantees a 'clean start': competition for nutrients and moisture during the critical growth phases of soybean, sunflower, and corn is eliminated at the embryonic stage.

Technical Aspects of the Formulation

The product is formulated as an emulsifiable concentrate (EC). This form ensures the creation of a stable emulsion when mixed with water, which is critical for the uniform distribution of the spray solution over the soil surface. The optimal dosage range of 1.5–3 l/ha allows for adapting the application rate based on soil type: the lower threshold is recommended for light (sandy) soils, while the upper threshold is for heavy (clay/humic) soils, ensuring the formation of a persistent 'herbicidal screen'.

Practical Application

• Timing: 'Gerb 900 KE' is a classic soil-applied (pre-emergence) herbicide. Efficacy depends directly on soil moisture; a certain level of moisture or subsequent rainfall is required to activate the active ingredient.
• Selectivity: Due to its selective nature, the target crops (corn, sunflower, soybean) metabolize acetochlor without suffering phytotoxic stress, while susceptible weed species perish during the germination phase.
• Operational Discipline: The high concentration (900 g/l) makes the product efficient in logistics and storage. It is vital to note that only one application per season is permitted; this is sufficient to control the early wave of weeds, allowing the crop to develop a robust root system without competing for vital resources.