Valter

Why "Walter" is a staple in my crop protection toolkit

When it comes to protecting potatoes and tomatoes, I prefer a dual-action approach. The "Walter" fungicide from Nanjing Essence Fine-Chemical Co., Ltd. provides exactly that. By combining contact action (mancozeb) and systemic properties (metalaxyl/phenylamides), it hits pathogens both on the surface and from within the plant tissue.

Field Application and Handling

The product comes as a wettable powder, which is a big plus for equipment maintenance. It dissolves quickly without clogging the sprayer nozzles, ensuring a smooth and even application across the field. With a 3rd hazard class rating, standard safety gear is non-negotiable, but the application process itself is straightforward.

• Dosage: 2.5–3 kg/ha, which covers the plant canopy effectively.
• Systemic support: The phenylamide component is crucial because it protects the new growth that emerges after the spray.

Best Practices for Efficiency

I rely on "Walter" for proactive control of late blight, early blight (alternaria), and downy mildew. I limit myself to 3 treatments per season to maintain efficacy and prevent resistance. The 14 to 20-day pre-harvest interval is the most important factor to manage; I strictly enforce this to ensure the chemical levels in the harvest are zeroed out. If the weather turns humid and warm, I know that having "Walter" in the tank is the best way to secure my yield against fungal pressure.