1103 POlsen

Root System Engineering Potential

The '1103 POLSEN' rootstock from Stepanov & Sons is a specialized solution for viticulturists operating in challenging or problematic soil conditions. The physiology of this hybrid is based on a strategy of intensive vegetative mass accumulation, making it indispensable for establishing commercial vineyards with high load requirements per vine.

Biological Defense as a Core Standard

The key advantage of 1103 POLSEN lies in its genetic resistance to pathogens that traditionally limit vine potential. Integrated breeding markers provide systemic resistance against:

• Downy Mildew (Plasmopara viticola): a high-performance barrier function prevents spore proliferation in the root zone and on vegetative parts.
• Powdery Mildew (Erysiphe necator): the rootstock creates conditions that reduce susceptibility even in high-humidity environments.
• Nematodes: the hybrid's robust root system minimizes the negative impact of soil pests, preserving the integrity of conductive tissues.

Practical Adaptability

As a vigorous rootstock type, 1103 POLSEN demonstrates excellent graft compatibility with various scion varieties. High growth vigor ensures active sap flow, which is critical for late-ripening varieties or in regions with short growing seasons. Utilizing this rootstock helps mitigate nutrient deficiencies through deeper and more aggressive exploration of the soil horizon. Developed in Ukraine, this variety ensures adaptation to specific local climate cycles, providing stable survival rates for seedlings during field planting.