The annual Discovery Field Days hosted by Enza Zaden in Twisk centered on the theme Resistance makes the difference, with specific focus on Intermediate Resistance (IR) Nasonovia Nr:1. Over three days, growers, partners, and specialists from the Netherlands and abroad gathered to discuss current challenges in the leafy vegetable segment, particularly the spread of the Nasonovia aphid in iceberg lettuce.
© Enza Zaden
Introduction of new iceberg lettuce varieties
During the event, four new iceberg lettuce varieties were introduced, combining IR Nasonovia Nr:1 resistance, full Bremia resistance (BL:29-41), and HR Nr:0. The Nasonovia Nr:1 aphid continues to affect lettuce production across Europe, creating a need for integrated solutions. According to Enza Zaden, these varieties are designed to complement existing aphid control tools. Product Manager Leafy Paul Huijs noted: "The new varieties are comparable to our existing and well-performing variety Eduardo. The trials we conducted over the past year are very promising. The new varieties will be available for cultivation by mid-2026."
© Enza Zaden
Conference and knowledge exchange
On Thursday afternoon, the Nasonovia Conference brought together more than 60 professional growers. Presentations and discussions focused on the biology of the Nasonovia aphid, management strategies, and the performance of IR-resistant varieties. Attendees also visited demonstration fields and had the opportunity to exchange experiences with experts and colleagues.
© Enza Zaden
International attendance
The Discovery Field Days concluded with field visits and networking sessions. Growers from several countries attended, highlighting the international relevance of the Nasonovia Nr:1 issue for lettuce production.
© Enza ZadenFor more information:
Brit Fopma
Enza Zaden
Tel: +31 (0) 228 350 100
Email: [email protected]
www.enzazaden.com