Stark, KS

Mechanism of Action and Systemic Activity

"Stark, SC" is based on azoxystrobin, an active ingredient from the strobilurin class. Unlike contact fungicides, this preparation possesses translaminar and systemic properties. Upon contact with the leaf surface, the azoxystrobin molecule redistributes rapidly, penetrating plant tissues and protecting not only the treated areas but also new growth. At the cellular level, the substance blocks mitochondrial respiration in fungal cells (Qo-site inhibitor), depriving the pathogen of the energy required for mycelial development and spore germination.

Agronomic Efficiency

The product demonstrates high efficacy against a wide range of pathogens: from Alternaria leaf blight and late blight in tomatoes to Septoria and powdery mildew in winter wheat. In sunflower, the fungicide is indispensable for managing Phomopsis and Phoma, effectively suppressing infection development even under high-humidity conditions.

• Systemicity: A long-lasting protective period (up to 30 days) minimizes the required number of applications.
• Application Flexibility: The application rate of 0.5–0.8 L/ha allows for adjustment based on the specific phytosanitary situation in the field.
• Safety Profile: Classified as Hazard Class 3, providing predictability when integrated into crop protection programs.

Practical Application Guidelines

The stability of the preparation in suspension concentrate form ensures rapid preparation of the working solution without sedimentation issues. It is crucial to limit the number of treatments to 1–3 times per season to prevent the development of resistance in pathogens. Maintaining a pre-harvest interval of 20–30 days is critical for food safety compliance.