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Uireka 4.0 focuses on resilient and sustainable onions

1 May 2026 - John Ramaker

Onion cultivation is under pressure due to disease pressure, regulations, and climate change, while collaboration within the chain is increasing. Uireka 4.0 focuses on cultivation, storage, and variety research. Read more about the research program in onion cultivation.

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The research program runs from 2026 through 2029 and builds on nine years of previous results. During that period, Uireka has already delivered concrete innovations, such as the Fusarium test, improved cultivation systems with fertigation, and new strategies against pests such as thrips and diseases such as downy mildew.

According to the organization, further cooperation in the chain is essential to maintain the international competitive position of the Dutch onion. The program therefore focuses on practical solutions that growers can apply immediately, from cultivation to storage.

Focus on current challenges
Within Uireka 4.0, the emphasis lies on four key themes:

  1. Fusarium control: more insight into the spread and control of this persistent soilborne disease.
  2. Irrigation and cultivation systems: more efficient water use and optimization of cultivation methods.
  3. Breed research: independent comparison of onion varieties on different soil types.
  4. Custody: alternatives to chemical sprout inhibition while maintaining quality.

In addition, work is being done on Integrated Crop Management (ICM) for downy mildew, bean fly, onion fly, and thrips, among others. Digital decision support is intended to help growers intervene in a more targeted and sustainable manner.

Broad support from the sector and the government
Involvement is growing, emphasizes steering committee chairman Gijsbrecht Gunter. Six provinces are now co-investing, as is BO Akkerbouw. ​​"With this joint approach, we are increasing our clout," he states.

The project unites parties from the entire chain, from breeders and growers to exporters and knowledge institutions such as Wageningen University & Research.

Knowledge sharing takes center stage
A key priority remains the rapid translation of research results into practice. Growers are actively involved through field trials, demo days, and the Uireka Academy. Digital knowledge platforms will also play a greater role.

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