Teresel w.g.

Strategic Disease Control: Technical Overview of Tereseal W.G.

Maintaining a healthy apple orchard requires a precise approach to fungicide application. Tereseal W.G., manufactured by BASF SE (Ludwigshafen, Germany), offers a balanced combination of contact and systemic properties, specifically engineered to combat apple scab and powdery mildew.

Technical Composition and Mode of Action

The efficacy of this product lies in the synergistic interaction of its active ingredients:

• Dithianon: Acts as a contact barrier on the leaf surface. Its chemical structure provides excellent wash-off resistance, ensuring persistent protection even during high-rainfall periods. It works by inhibiting the respiration processes of the pathogen.
• Pyraclostrobin: A member of the strobilurin family that provides systemic and translaminar activity. Beyond its primary fungicidal effect, it promotes plant physiological health, often referred to as the «green leaf effect,» which optimizes photosynthesis and enhances the tree’s resilience to environmental stress.

Application Standards and Handling

Formulated as water-dispersible granules, Tereseal W.G. ensures quick mixing and minimal dust exposure during preparation. To optimize field performance, growers should adhere to the following parameters:

• Application Rate: 2–2.5 kg/ha, depending on the infection pressure and the developmental stage of the orchard.
• Treatment Frequency: Maximum of 3 applications per season.
• Pre-harvest Interval (PHI): The final treatment must occur at least 30 days before harvest.

By integrating these two distinct modes of action into a single formulation, Tereseal W.G. helps streamline orchard management, reducing the total number of spray runs while ensuring high-quality yields. Classified as a Class 3 hazardous substance, it requires standard safety protocols during handling and application.