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Morocco Restarts Potato Trials to Develop Varieties Resistant to Late Blight, a Major Threat to Crops
Moroccan agricultural researchers are restarting field trials to develop potato varieties resistant to late blight, a devastating fungal disease caused by Phytophthora infestans. The initiative, led by Moroccan agricultural research institutions in collaboration with international partners, aims to reduce reliance on chemical fungicides and safeguard potato production—a critical crop in Morocco’s food security and export economy.
Late blight has long been the bane of potato farmers worldwide, capable of wiping out entire harvests under favorable climatic conditions. In Morocco, where potato cultivation spans coastal regions like Kenitra to El Jadida, as well as mountainous areas of the Middle Atlas, the disease poses a significant threat, particularly during humid seasons. According to agricultural experts, the disease can lead to losses of up to 80% in severe outbreaks, as reported by ARGENPAPA.
The renewed focus on resistance comes as global research into potato genetics has made significant strides. The Institut National de la Recherche Agronomique (INRA) in France, for example, has contributed to the development of genetic material resistant to both late blight and potato cyst nematodes, reducing the necessitate for pesticide use. These advances are now being adapted to Moroccan conditions, where climate variability and irrigation practices further complicate disease management.
Why Resistance Matters for Moroccan Farmers
Morocco’s potato production is concentrated in several key regions, including the coastal plains of the Loukkos-Doukkala-Moulouya and the mountainous areas of the Middle Atlas. These regions are particularly vulnerable to late blight due to their humid climate and frequent rainfall, which create ideal conditions for the disease to spread. The restart of resistance trials is a response to the increasing challenges posed by climate change, which has intensified the frequency and severity of late blight outbreaks.
Traditionally, farmers have relied heavily on copper-based fungicides to combat late blight. However, these chemicals are costly, pose environmental risks, and may not be sustainable in the long term. The new trials aim to identify potato varieties that can resist the disease naturally, thereby reducing the need for chemical interventions and lowering production costs. According to recent studies, such as those conducted in the Triffa plain of eastern Morocco, integrating resistant varieties with improved irrigation techniques—like subsurface drip irrigation—could further enhance disease control and water efficiency (E3S Web of Conferences, 2024).
Global Context: Progress in Late Blight Resistance
Internationally, researchers have made notable progress in developing potato varieties with durable resistance to late blight. For instance, a study published in Potato Research (2026) highlights the use of subsurface drip irrigation in Morocco’s Fès-Meknès region to enhance potato production in semi-arid environments. The integration of resistant varieties with water-saving strategies demonstrates a holistic approach to sustainable agriculture, one that Morocco is now adopting.
In Europe, initiatives like the POTSTAR project have successfully stacked three late blight resistance genes from wild potato species into cultivated varieties, resulting in complete field resistance to local blight races. These advancements offer a blueprint for Morocco’s efforts, where local researchers are now evaluating the adaptability of such genetic improvements to Moroccan conditions.
What’s Next for Morocco’s Potato Trials?
The restart of these trials follows years of research and collaboration among Moroccan agricultural institutions, including the Centre Marocain de Génétique et de la Production Végétale (CMGP-CAS) and the Institut National de la Recherche Agronomique (INRA). The next phase involves field testing promising varieties under real-world conditions to assess their resistance and yield potential.
For farmers and stakeholders, the outcomes of these trials could mark a turning point in potato production. Reduced reliance on fungicides would not only lower costs but too minimize environmental impact, aligning with global sustainability goals. Meanwhile, the Moroccan government and agricultural agencies are expected to provide support through funding, training, and policy incentives to accelerate the adoption of resistant varieties.
Key Takeaways
- Late blight remains a critical threat to Morocco’s potato crops, capable of causing up to 80% yield losses.
- New trials aim to develop resistant potato varieties, reducing the need for chemical fungicides.
- Integrating resistant varieties with water-saving irrigation techniques could enhance sustainability.
- Morocco’s efforts build on global research, including genetic advancements from Europe and North America.
- Success in these trials could lower production costs and improve food security.
As the trials progress, updates from Moroccan agricultural research institutions will be closely monitored. Farmers and industry stakeholders are encouraged to stay informed through official channels, such as the CMGP-CAS and the ARGENPAPA platforms, for the latest developments.
For now, the restart of these trials signals a promising step toward securing Morocco’s potato production against one of its most persistent agricultural challenges.
Jonathan Reed, Editor, News
© World Today Journal, May 4, 2026
— **Note:** This article is based on verified research and authoritative sources. For further details, readers are encouraged to consult the linked institutions and studies. The next checkpoint for updates will be the release of field trial results, expected in late 2026 or early 2027, pending confirmation from Moroccan agricultural research bodies.