Pepper growers and market parties are joining forces to identify the cause of the die-off of pepper plants in greenhouses. These issues have been occurring for several years at various cultivation companies. A clear cause has not yet been established.
In practice, the pathogen Fusarium oxysporum f.sp. radicis-capsici (FORC) has been found, but growers suspect that this is not the only explanation. Last fall, the parties involved came together to pool knowledge and experiences and to determine a joint research direction.
Broad Collaboration
Based on that consultation, Normec Groen Agro Control has drafted a research proposal. This focuses on a wide range of measurements under different cultivation conditions. After intensive consultation with growers and companies, the proposal has been further refined.
Support from market parties has proven crucial for financing. The following companies are actively participating in the project: Royal Brinkman, Saint-Gobain Cultilene, Enza, Grodan, Rijk Zwaan, Roam Technology, and Syngenta. A contribution has also been received from Interpolis and Innovatiefonds Hagelunie. The members of the crop cooperative Pepper also contribute financially.
Research Approach
Twelve pepper growers are being intensively monitored for factors that may be related to plant die-off. Consider:
- Oxygen level in the substrate mat
- Oxygen consumption in mat and irrigation water
- Plant load, photosynthesis, and nutrient uptake
In addition, water samples are analyzed for the microbiome: the composition of microorganisms (such as bacteria, fungi, and yeasts) in and around the root environment. A QPCR test is being developed in Belgium to test for the presence of pathogenic Fusarium. This data should provide more insight into the relationship between plant health and susceptibility to die-off.
Structural Consultation
Both the growers and the market parties regularly meet to discuss progress and adjust the research as needed. By pooling knowledge and expertise, they aim to gain more control over this persistent problem. Additionally, there is an exchange with the ongoing Fusarium research in Belgium.
Source: Glastuinbouw Nederland
