Primextra TZ Gold 500 SC

Why «Primextra TZ Gold 500 SC» is the gold standard of soil-applied protection

The success of corn, sunflower, or soybean cultivation is determined long before the first sprouts appear. Syngenta has developed «Primextra TZ Gold 500 SC» as a two-component system, where the synergy of active ingredients ensures control over weeds during the crop's most vulnerable development stage.

Technical Breakdown of the Formula

At the heart of the product is a combination of S-metolachlor and terbuthylazine. This combination does not simply sum up their effects; it compensates for each other's weaknesses:

• S-metolachlor: Acts as a «shield», creating a protective screen in the top layer of the soil. It blocks protein synthesis in germinating grass weeds and some broadleaf weeds, halting their development at the seedling stage.
• Terbuthylazine (triazine group): Responsible for controlling a broad spectrum of broadleaf weeds. It is absorbed by the root system and sprouts, inhibiting photosynthesis in the weed, which leads to rapid death.

The suspension concentrate formulation was chosen for a reason. It guarantees excellent solubility and uniform distribution in the soil solution, which is critical for creating a continuous protective layer. Due to its systemic action, the product penetrates weeds even as they germinate, ensuring high selectivity toward the crops.

Practical Efficiency

As a pre-emergence herbicide, Primextra TZ Gold requires a certain level of soil moisture for activation. It is «smart» protection: the product remains active in the soil for 6–8 weeks. This prolonged duration of action relieves pressure on the agronomist during the intense sowing period, when multiple applications are physically impossible. One precise operation before emergence is enough to eliminate competition for moisture and nutrients during the early stages of vegetation.

It is important to remember that the hazard class 3 requires adherence to standard safety measures during application. Following the regulations (from 0.5 to 4.5 L/ha depending on soil type and crop) allows achieving maximum selectivity, ensuring a clean field without phytotoxicity to the target crop.