Belgian vegetable yields are facing potential declines as extreme weather cycles—shifting from a cold, humid spring to intense heatwaves—disrupt pollination and crop development. According to reporting by Yasmine Meziani for RTBF, these climatic swings specifically threaten the production of tomatoes, carrots, and squash, forcing growers to adopt new shading and cooling techniques to protect their harvests.
Why are heatwaves causing lower vegetable yields in Belgium?
Extreme heat disrupts the critical pollination phase of plant growth. Sandrine Detry, a professional market gardener, reports that heatwaves can cause flowers to wither or dry out almost immediately. This happens before pollinators can reach the flowers, preventing the fruit from forming.
Detry notes that this has left tomato plants with rare, damaged fruits and incomplete clusters. The issue is compounded by a “cold and humid” start to the season, which weakened plants before the heat hit. Beyond tomatoes, the impact extends to root vegetables like carrots and onions, as well as squash.
How are farmers adapting to extreme weather?
The agricultural sector is shifting toward physical interventions to regulate temperature and light. Alain Delvigne, a consultant at the Centre interprofessionnel maraîcher, suggests that producers using tunnels or “multichapelle” structures must implement specific adaptations.
Recommended strategies include:
- Installing shading systems to block direct sunlight.
- Using “whitening” techniques on greenhouses to reflect heat and reduce internal temperatures.
What happens to vegetable prices when harvests fail?
While prices for vegetables currently remain stable within Belgium, neighboring markets show a different trend. According to RTBF, tomato prices in France have already risen, with costs currently between 2 and 3 euros higher per kilo than last year.
Frequently Asked Questions
Which vegetables are most affected by Belgian heatwaves?
Tomatoes, carrots, squash, and onions are specifically cited as crops seeing reduced yields due to extreme weather.
Why do tomato flowers dry up?
According to gardener Sandrine Detry, intense heat can “cook” or desiccate the flower before pollination occurs, preventing the fruit from growing.
Are vegetable prices rising in Belgium?
Currently, prices remain stable in Belgium, though significant increases have been reported in France.
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