Astrel Max (Astrel Max)

Weed control mechanism in Astrel Max

The efficacy of Astrel Max (manufactured by Shandong Weifang Rainbow) relies on the synergy between two active ingredients: acetochlor and terbuthylazine. This combination creates a potent systemically acting soil herbicide. Acetochlor blocks protein and nucleic acid synthesis in weed seedlings, causing their demise before they emerge. Terbuthylazine acts by inhibiting photosynthesis, providing a prolonged period of soil protection.

The critical role of the safener

The standout feature of this formulation is the inclusion of a safener. It allows the use of the herbicide on crops like corn and sunflower without the risk of phytotoxicity. The safener selectively accelerates the metabolism of the active ingredients within the crop plant, enabling it to neutralize the herbicide, while weeds remain vulnerable.

Application and field usage

• Formulation: As a water-based suspension concentrate, it ensures an even spread across the soil surface, which is crucial for pre-emergence soil-applied herbicides.
• Selectivity: The herbicide targets annual broadleaf and grass weeds. The recommended application rate ranges from 1.0 to 2.0 L/ha.
• Application timing: It serves as a pre-emergence herbicide, creating a protective 'screen' in the topsoil layer. With a maximum of one application per season, it is vital to have adequate soil moisture at the time of application to activate the active components.

Astrel Max is a Category 2 hazardous material, requiring standard safety protocols during handling. It is designed for farmers prioritizing clean fields from the early stages of vegetation, preventing weeds from competing for moisture and nutrients with the main crop.